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1·Do you want that cake? If not, I'll have it.

你要那块蛋糕吗？不然我就要了。《牛津词典》

2·Such measures are desirable, if not essential.

这些措施即使不是必要，也是可取的。《牛津词典》

3·If not for John, Brian wouldn't have learned the truth.

要不是约翰，布莱恩不会了解真相。《柯林斯英汉双解大词典》

4·Are you pressed for time? If not, I suggest we have lunch.

你时间紧吗？如果不紧的话，我建议我们一起吃午饭。《柯林斯英汉双解大词典》

5·She understood his meaning, if not his words, and took his advice.

她即便不懂他的语言，也明白了他的意思，并且接受了他的建议。《柯林斯英汉双解大词典》

6·The government had a moral, if not a legal, duty to pay compensation.

政府即使没有法律上的义务也有道义上的义务进行赔偿。《柯林斯英汉双解大词典》

7·If not a large concern, the Potomac Nursery was at least a successful one.

虽不是一个大生意，波托马克幼儿园至少是一个成功的公司。《柯林斯英汉双解大词典》

8·She felt, if not grateful for her own situation, at least a little more reconciled to it.

她觉得，即便对自己的处境不心存感激，至少能将就一些了。《柯林斯英汉双解大词典》

9·If not her son, she probably would have died right there in her bathtub.

如果不是她儿子，她可能就死在浴缸里了。

10·If not, do an error exit.

如果没有，则执行错误退出。