dì yī cì
the first time
first
number one
dì yī lún
first round (of match, or election)
dì yī rén chēng
first person (in writing)
dì yī jì dù
first quarter (of financial year)
dì yī fū rén
First Lady (wife of US president)
dì yī shēng
first tone in Mandarin
high level tone
dì yī tǒng jīn
the first pot of gold
the initial profits from an economic endeavour
shì jiè dì yī
ranked number one in the world
the world's first
tiān xià dì yī
first under heaven
number one in the country
dì yī chǎn yè
primary sector of industry
dì yī lì
first case
first instance
first time (sth is done)
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 鄧小平|邓小平 introducing the Four Modernizations 四個現代化|四个现代化).
dì yī guó jì
First international, organized by Karl Marx in Geneva in 1866
dì yī xiàng xiàn
first quadrant (of the coordinate plane, where both x and y are positive)
dì yī jī běn xíng shì
(math.) first fundamental form
Guó yǔ zhù yīn fú hào dì yī shì
Mandarin Phonetic Symbols 1 (official name of the phonetic system of writing Chinese used in Taiwan)
Bopomofo
abbr. to 注音一式[zhu4 yin1 yi1 shi4]
dì yī shí jiān
in the first moments (of sth happening)
immediately (after an event)
first thing