名詞 dos:

1. the federal department in the United States that sets and maintains foreign policies
   同義詞：Department of State, United States Department of State, State Department, State
2. an operating system that is on a disk
   同義詞：disk operating system

名詞 do:

1. an uproarious party
   同義詞：bash, do, brawl
2. the syllable naming the first (tonic) note of any major scale in solmization
   同義詞：do, doh, ut
3. doctor's degree in osteopathy
   同義詞：Doctor of Osteopathy, DO

動詞 do:

1. engage in
   同義詞：make, do
2. carry out or perform an action
   同義詞：perform, execute, do
3. get (something) done
   同義詞：do, perform
4. proceed or get along
   同義詞：do, fare, make out, come, get along
5. give rise to; cause to happen or occur, not always intentionally
   同義詞：cause, do, make
6. carry out or practice; as of jobs and professions
   同義詞：practice, practise, exercise, do
7. be sufficient; be adequate, either in quality or quantity
   同義詞：suffice, do, answer, serve
8. create or design, often in a certain way
   同義詞：do, make
9. behave in a certain manner; show a certain behavior; conduct or comport oneself
   同義詞：act, behave, do
10. spend time in prison or in a labor camp
    同義詞：serve, do
11. carry on or manage
    同義詞：do, manage
12. arrange attractively
    同義詞：dress, arrange, set, do, coif, coiffe, coiffure
13. travel or traverse (a distance)
    同義詞：do

1. It won't do to hedge your pupils in with a thousand dos and don'ts.
   用無數(shù)清規(guī)戒律去束縛學(xué)生是不行的。
2. Do all computers use binary system?
   所有的計算機(jī)都使用二進(jìn)制嗎？
3. In everyday conversation, you request people to do things, not "order" them.
   在日常會話中，你是請求別人做事，而不是"命令"他們。
4. Come on, fair dos you've had a long go on the computer and now it's my turn.
   行了，機(jī)會均等--你用計算機(jī)已經(jīng)很長時間了，現(xiàn)在該輪到我了。

DOS

n.Computer Science （名詞）【計算機(jī)科學(xué)】
An operating system that resides on a disk.
DOS操作系統(tǒng)，磁盤操作系統(tǒng)：置于磁盤上的操作系統(tǒng)

來源：
d(isk) o(perating) s(ystem)
d(isk) o(perating) s(ystem)