We hope there never is such a person, but the sentence is grammatical, well-formed, and easily understood.

我们绝不希望有这种人，但是，这句话语法正确，结构标准，且易于理解。

youdao

But other compounds found in dolphin blubber may explain why injuries such as shark bites aren't a death sentence.

但是，人们在海豚的鲸脂内发现了另一种化学物质，它或许可以解释为什么海豚在受伤后，比如说被鲨鱼咬过后不会致死。

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Informal sites can include sentence fragments (which lack subject, verb, or both) and sentences that begin with a conjunction (such as and or but).

非正式网站可以使用句子片段(缺少主语或谓语)。句子开头用链接词(如and或but)。

youdao

Again, she wished to say that she loved him not because she was sure she loved him but because it was such a perfectly insular sentence.

NEWYORKER: Soldier��s Joy

In April, he conceded that he had made mistakes sinking millions into Irish bank shares, but said such mistakes should not result in a life sentence.

BBC: anglo irish bank exterior

Desertion was also punishable by death by firing squad, but the U.S. Army had not carried out such a sentence since 1864.

CNN: Private Ryan was a hero, but there were bums, too