1. It is all very well for such things to occur in fiction.
    这种事情出现在小说中倒还可以。

2. It is all very well for such things to occur in fiction.
    这种事发生在小说中是无可非议的。

3. If no accidents occur on the way, like punctured tyres, diversions of traffic, sudden descent of fog, they will be on time.
    要是路上没有发生如爆胎、改道、突然起雾等意外事故，他们决不会迟到。

4. In sub-Saharan Africa and Latin America, particularly the Caribbean, most cases occur among heterosexuals, and spreading from mother-to-child is common.
    在靠近撒哈拉沙漠的非洲地区、拉丁美洲，尤其是在加勒比海地区，大多数病例都发生在异性恋者之间，而且往往是母子之间传播。