1. Duck 躲闪，突然低下头，回避（问题）
Rodger forgot to duck his head when he crawed under the table, so he hit his head.
罗杰爬到桌下时忘记低头，结果头撞上了桌子。
链接：
“Dear, I forgot to duck.”“亲爱的，我忘了躲了。”这是里根总统遇刺后对夫人南希说得第一句话。
duck an issue: 回避问题
2. Dud 无用的，无用之物
The meeting was a real dud -- we didn't get anything accomplished.
这次会议毫无意义，什么都没解决。
释义：本义是“哑弹”，扔出去炸不响。
