at length 终于，最后；详细地
in the light of 按照，根据
in line 成一直线，排成一行
in line with 与……一致，按照
at a loss 困惑，不知所措；赔本的
by all means 无论如何，必定
by means of 借助于，用
by no means 决不
in memory of 纪念
at the mercy of 在……支配下
by mistake 错误地
at the moment 现在，此刻
for a moment 片刻，一会儿
for the moment 现在，暂时
in a moment 立刻，马上
点睛： 最适合应用在写作中的表达
【例句】I am at a loss to understand those remarks.我不理解那些话。
【例句】Drifting in an open boat, at the mercy of the elements.在一敞篷船中漂泊，任由暴风雨摆布。