重点讲解：
1. have no idea (表示强调)不知道；
'Is she coming by coach?' — 'Well I've no idea.'
“她坐长途汽车来吗?”——“哦，我不知道*O#XmhI,gD~]Dn0^=。”
2. come in contact with 接触；
How many people did he come in contact with?
他接触过多少人？
3. come across 偶然发现；偶然遇见；
We like to identify and celebrate women's success whenever we come across it.
每当女性取得成功，我们都会表示认同并予以颂扬iC4;3OSHKTUTpIn9mKq。
4. throw out 扔掉，丢掉；
As we accumulated more devices, however, we didn't throw out our old ones．
然而，我们积累更多设备的同时也没有丢弃旧设备JHnpy~NIMIu%2x@53A。

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