A lawful act is an act which the law allows.

合法行为系指法律所允许的行为。

The flaw of instrument is an important problem in the negotiable instrument law, because the flaws of instrument may represent both illegal act and lawful act.

票据瑕疵是票据法中一个重要问题，票据瑕疵既包括违法行为，也包括合法行为。

Justifiable % defence is the act being exempted from crimes, namely, this act appears to cause damage to lawful rights and interests, but in essential it protects lawful rights and interests.

正当防卫是排除犯罪性的行为，也就是说，这种行为在表面上给合法权益造成了损害，实质上却是保护了合法权益。

It was not considered lawful to act that way.

大家认为这样做是不合法的。

These mass organizations shall act strictly according to law and protect the lawful rights and interests of the citizens.

治安保卫组织应严格依法办事，保护公民的合法权益。