If it's illegal for someone under 21 to drink, it should be illegal for them to drink and drive. That's a no-brainer.

如果不满21岁喝酒是违法的，那他们酒后驾车也应是违法的。这太容易理解了。

《柯林斯英汉双解大词典》

Clearly, the sale of such stuff ought to be illegal.

显然，出售此类物品应该是违法的。

youdao

Because of America's gun culture, guns will never be illegal in the US. Many foreigners who have spent so much time in China are happy about the Chinese lifestyle.

因为美国的枪支文化，枪支在美国永远都是合法的。许多在中国待了很长时间的外国人对中国人的生活方式很满意。

youdao

North of the line, slavery would be illegal.

VOA: special.2009.07.23

Do you think that downloading should be absolutely illegal and prohibited?

你觉得下载是绝对违法的，应该禁止吗？

不能非法下载 - SpeakingMax英语口语达人

So even without there being an Attorney General, somebody might be awake in the justice department and notice that that's actually illegal.

就算是司法部长不知情,司法部门也会有人会发现,这样的协议是违法的

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He said members had not been balloted for strike action, so any participation would be illegal.

BBC: Council staff strike causes havoc

On Thursday, a General Accounting Office official told Congress this policy may be illegal.

FORBES: New U.S. Nuclear Waste Policy May Be Illegal: GAO

Whitehead says his construction-company clients suspect as many as half their workers may be illegal.

FORBES: Who's Gonna Do the Work?