Conoids
[醫(yī)]尖牙
??? 情景例句
You're clueless.
你真無知。
Temperance is the greatest of virtues.
自我節(jié)制是最大的美德。
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.
我們必須把很長(zhǎng)的鉆桿一節(jié)節(jié)地鉆入地下，然后再?gòu)牡叵吕鰜怼ｃ@桿頂部安裝的發(fā)動(dòng)機(jī)帶動(dòng)鉆桿旋轉(zhuǎn)，它的底部裝有鉆頭。