adj.弱的；虚弱的；无力的；差的；淡薄的

The troops were too weak to withstand. 军队太弱了,抵挡不住下一次进攻。

He was too weak even to lift his hand. 他虚弱得连手都抬不起来。

She felt weak from lack of sleep. 她由于睡眠不足感到浑身无力。

Your argument is too weak to convince me 你的论点太薄弱了，说服不了我。

A person with weak sight cannot see far. 视力差的人不能看得很远。

According to the direction, we need a weak sugar solution. 按照指示，我们要用少放糖的配方。

weak的基本意思是“弱的,无力的”,用于人可修饰人体或人体的某个器官,也可修饰人的意志。用于物时可指某物的性能不好,即“功能不佳的”,也可指某物在理论上让人无法信服,即“无说服力的,无力的”。weak还可指“稀的,稀释的”“未达高标准的”。

weak在句中可用作表语,也可用作定语。用作定语时,其后可接具体名词或抽象名词,作表语时,其后可接介词短语、动词不定式或that从句。