n.定位焊;紧钉
n.变换航向
动词tack的现在分词形式.
His brother is sharp as a tack; he got100 on every test. 他弟弟十分聪明伶俐,每次考试都得100分。
By tacking about, we were able to avoid the enemy guns. 我们摆动着船帆不停地调转船头,才得以躲过敌人的炮弹。
n.攻击;抨击
v.攻击;抨击;发动攻击;(疾病)侵袭
n.堆垛;分层
动词stack的现在分词形式.