sub-

柯林斯詞典

1. PREFIX Sub- is used at the beginning of words that have "under" as part of their meaning. 表示“下、在下”
The waters were rising about the rock and would soon submerge it. 水漲到快跟巖石一樣高了，很快就會(huì)將它淹沒。
...a nuclear-powered submarine. ...一艘核力發(fā)電的潛水艇。
2. PREFIX Sub- is added to the beginning of nouns in order to form other nouns that refer to things that are part of a larger thing. 表示“附屬、下屬”
...a subcommittee on family values and individual rights. ...一個(gè)家庭價(jià)值觀和個(gè)人權(quán)利的附屬委員會(huì)。
...the subdivision of farms into smallholdings. ...將辳場再細(xì)分成小辳場。
3. PREFIX Sub- is added to the beginning of adjectives in order to form other adjectives that describe someone or something as inferior, for example inferior to normal people or to normal things. 表示“低於、次於”
The cold has made already substandard living conditions even worse. 寒冷的天氣使得原本就低於正常水平的生活條件更加低劣。