Servo(mechanism)
[化] 伺服機構
??? 情景例句
I would like to buy some stamps, please.
我想買些郵票。
Many hands make light work.
眾擎易舉。
But, of the vertebrates, unpredictable Nature selected only snakes (and one lizard).
不過，當它們相互撕打時，毒液就成了利弊參半的武，可以殺死對方，也可以被對方的毒液殺死。