硬用英语怎么说介绍如下：
hard：英/hɑːd/ 美/hɑːrd/。
adj.努力的;硬的;坚硬的;艰难的;艰苦的;用力的;坚固的;确凿的;结实的;难懂的;寒冷的;难做的;困苦的;冷酷无情的;难以回答的;硬音的;耗费体力（或脑力）的;酒精浓度高的;准备战斗的。
adv.努力地;艰难地;猛烈地;费力地;沉重地;猛力地;向左 / 右急转弯;彻底认真地。
n.(囚犯的)强迫苦役;硬海滩。
比较级： harder最高级： hardest。
派生词： hardness n.
The substance polymerizes to form a hard plastic.
这种物质聚合形成坚硬的塑料。
Diamonds are the hardest known mineral.
钻石是已知的最坚硬的矿石。
The cutters have very hard teeth made from special steel or from diamonds.
刀具上有用特种钢或金钢石制造的非常坚硬的齿。
Granite is a very hard stone.
花岗岩是一种很坚硬的石头。
This kind of beetles have hard shell.
这类甲虫有坚硬的外壳。
He continued on until the shovel made a dull sound as if it had struck something hard.
哈桑持续不断地挖，直到铁锹发出一声沉闷的声响，好像碰到了什么坚硬的东西。
The larva is fed by the working bees, and in a few days it makes for itself a hard skin, and is called a pupa.
工蜂负责给幼虫喂食。几天之后，它们便会长出坚硬的皮肤，这就是蛹。