| 单词 | 才发现有多难 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔sight〕The question seemed easy at first sight (= when they first saw it), but when the students tried to answer it, they discovered how difficult it was.乍一看，这个问题似乎很简单，但学生们试图回答时，才发现有多难。剑桥高阶 |
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