单词与短语：
1. acknowledge vt. （以点头、微笑等）向…打招呼，理会
eg. He saw her but refused to even acknowledge her.
他看见了她，却连招呼也不打。
eg. He never even bothered to acknowledge her presence.
他甚至对她的在场未予理会.
2. vanish v. 消失；失踪；突然不见；灭绝
eg. He just vanished and was never seen again.
他就这么消失了，再也没人见到过他。
The aircraft vanished without trace.
飞机消失得无影无踪。
eg. Near the end of Devonian times, thirty percent of all animal life vanished.
在泥盆纪末期，30％的动物物种都灭绝了。
3. have a word with sb. 和某人谈谈
eg. I suggest that you have a word with him.
我会建议你和他谈一下。
eg. I wonder if I could have a word with you right now.
不知道我可不可以现在和你说几句话。