为保证操作人员的人身安全安装了桨叶保护罩。A blade guard is fitted to protect the operator.我们也许可以用桨把自己推过去。We might be able to push ourselves across with the paddle.10英尺长的桨拿起来感觉很笨重。The ten-foot oars felt heavy and awkward....
火药是希腊火的直接衍生物.Gunpowder was the lineal successor of the Greek fire.这类合成物是亚硝基羟胺衍生物.These compounds are nitrosohydroxylamine derivatives.很多环戊烷的衍生物在这个范围也出现吸收.Many cyclopentane derivatives also absorb in this region....
It'struck her as providential that she should be the instrument of his initiation.在她看来,由她来担任这个启蒙的角色实出天意.He explained the yellow fever epidemic as a providential act to discourage urban growth...他解释说黄热病的流行恰好减缓了城市的扩张。...