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1·Indeed, in very few known cases, parent birds sometimes abandoned their nests from something touching their young, just because they noticed it by sight, not smell.

事实上，在一些已知的案例中，母鸟有时会因为孩子被碰触而弃巢，仅仅因为它们是通过视觉而不是嗅觉发现的。

2·No, but I know him by sight.

不认识，但我见过他。

3·I know him only by sight.

我只是见面会认识他。

4·I know you by sight.

我好象见过你。

5·We live by sight.

我们靠眼见而活。

6·We need to live more by faith than by sight.

我们要更多的凭信而活，而不是靠眼见。

7·I knew this young woman by name and by sight.

我知道这位姑娘的名字，也见到过她。

8·Good. Payment by sight draft or usance draft?

好，是即期支付还是远期支付？

9·I know him by sight but have never spoken to him.

我认识他是谁，但从没有和他谈过话。

10·I know her by sight though I have never spoken to her.

我和她面熟，不过我从没有同她谈过话。