| 独出一时 | dú chū yī shí | incomparable; head and shoulders above the competition |
| 独树一帜 | dú shù yī zhì | lit. to fly one's banner on a solitary tree (idiom); fig. to act as a loner; to stand out; to develop one's own school; to have attitude of one's own |
| 独当一面 | dú dāng yī miàn | to assume personal responsibility (idiom); to take charge of a section |
| 独霸一方 | dú bà yī fāng | to exercise sole hegemony (idiom); to dominate a whole area (market, resources etc); to hold as one's personal fiefdom |
| 生物专一性 | shēng wù zhuān yī xìng | biospecificity |
| 留一手 | liú yī shǒu | to hold back a trick; not to divulge all one's trade secrets |
| 毕其功于一役 | bì qí gōng yú yī yì | accomplish the whole task at one stroke |
| 略胜一筹 | lüè shèng yī chóu | slightly better; a cut above |
| 略知一二 | lüè zhī yī èr | slight knowledge of sth; to know very little about a subject; a smattering |
| 略见一斑 | lüè jiàn yī bān | to glimpse one spot (idiom); to judge at a single glance; anecdotal evidence |
| 白跑一趟 | bái pǎo yī tàng | to go on an errand for nothing; to go on a wild-goose chase |
| 百分之一百 | bǎi fēn zhī yī bǎi | one hundred percent; totally (effective) |
百尺竿头，
更尽一步 | bǎi chǐ gān tóu ,
gèng jìn yī bù | lit. hundred foot pole, progress still further (idiom); fig. much accomplished, still some work to do; to continue to further successes; not to rest on one's laurels |
| 百无一失 | bǎi wú yī shī | no danger of anything going wrong; no risk at all |
| 百闻不如一见 | bǎi wén bù rú yī jiàn | seeing once is better than hearing a hundred times (idiom); seeing for oneself is better than hearing from many others; seeing is believing |
| 百里挑一 | bǎi lǐ tiāo yī | one in a hundred; cream of the crop |
| 目空一切 | mù kōng yī qiè | the eye can see nothing worthwhile all around (idiom); arrogant; condescending; supercilious |
| 眉毛胡子一把抓 | méi mao hú zi yī bǎ zhuā | careless; any-old-how, regardless of the specific task |
| 看一看 | kàn yī kàn | to have a look |
| 众口一词 | zhòng kǒu yī cí | all of one voice; unanimous |
| 睁一眼闭一眼 | zhēng yī yǎn bì yī yǎn | to turn a blind eye |
| 碰一鼻子灰 | pèng yī bí zi huī | lit. to have one's nose rubbed in the dirt; fig. to meet with a sharp rebuff |
祖国和平统一委员
会 | zǔ guó hé píng tǒng yī wěi yuán huì | Committee for peaceful reunification of the fatherland (North Korean) |
科学技术是第一生
产力 | kē xué jì shù shì dì yī shēng chǎn lì | Science and technology is the number one productive force (from 1978 speech by Deng Xiaoping 邓小平 introducing the Four Modernizations 四个现代化). |
| 空无一人 | kōng wú yī rén | not a soul in sight (idiom) |
| 空跑一趟 | kōng pǎo yī tàng | to make a journey for nothing |
| 空军一号 | kōng jūn yī hào | Air Force One, US presidential jet |
| 窥豹一斑 | kuī bào yī bān | lit. see one spot on a leopard (idiom); fig. a restricted view |
竹篮打水，
一场空 | zhú lán dǎ shuǐ ,
yī chǎng kōng | using a wicker basket to draw water (idiom); wasted effort |
| 第一人称 | dì yī rén chēng | first person (in writing) |
| 第一例 | dì yī lì | first case; first instance; first time (sth is done) |
| 第一个层次 | dì yī gè céng cì | the first stage |
| 第一国际 | dì yī guó jì | First international, organized by Karl Marx in Geneva in 1866 |
| 第一型糖尿病 | dì yī xíng táng niào bìng | Type 1 diabetes |
| 第一基本形式 | dì yī jī běn xíng shì | (math.) first fundamental form |
| 第一夫人 | dì yī fū rén | First Lady (wife of US president) |
| 第一季度 | dì yī jì dù | first quarter (of financial year) |
| 第一桶金 | dì yī tǒng jīn | the first pot of gold; the initial profits from an economic endeavour |
| 第一次 | dì yī cì | the first time; first; number one |
| 第一步 | dì yī bù | step one; first step |
| 第一产业 | dì yī chǎn yè | primary sector of industry |
| 第一章 | dì yī zhāng | chapter one |
| 第一级 | dì yī jí | first level |
| 第一声 | dì yī shēng | first tone in Mandarin; high level tone |
| 第一象限 | dì yī xiàng xiàn | first quadrant (of the coordinate plane, where both x and y are positive) |
| 第一轮 | dì yī lún | first round (of match, or election) |
| 第十一 | dì shí yī | eleventh |
| 等一下 | děng yī xià | Wait a moment! |
| 等一下儿 | děng yī xiàr | erhua variant of 等一下 |
| 等一会 | děng yī huì | Wait a moment!; after a while |
