[材]硬铁
iron───vt.熨；用铁铸成；n.(Iron)人名；(英)艾恩；adj.铁的；残酷的；刚强的；n.熨斗；烙铁；坚强；vi.熨衣；烫平
hard───adj.努力的；硬的；困难的；辛苦的；确实的；严厉的；猛烈的；冷酷无情的；n.（Hard）人名；(英、芬、瑞典)哈德；adv.努力地; 猛力地; 严重地; 沉重地；adv.努力地；困难地；辛苦地；接近地；猛烈地；牢固地；adj.困难的; 硬的; 有力的; 努力的
hard wearing hard───耐磨的
hard by hard───一点一点地
play hard work hard───放肆玩乐，拼命工作
alcoholized iron───[医] 铁粉
iron pants───铁裤子
divalent iron───二价铁
iron woman───铁娘子
But whatever your views on this subject, it's hard to read the book and then happily go back to seeing language as a set of iron-bound rules that are constantly being broken by the morons around you.───这个观点你接不接受随你。但是不管你对这个问题的看法是怎么样的，这都是一本难读的书，而且后来你会不愉快地发现，那一套刻板的语言条例不断地在被你周围的猪头们打破着。
The ground floor there are oil, natural gas, coal, geothermal, limestone, dolomite, hard iron bauxite and other mineral resources, rich reserves, the exploitation of high value.───地下蕴藏着石油、天然气、煤炭、地热、石灰岩、白云石、硬铁矾土等矿产资源，储量丰富，具有较高的开采价值。
was all hard graft and iron discipline: hitting a ball, alone, for hours.───自己一个人练习击球，一练就几个小时——他成功是全凭自己刻苦努力和坚强毅力。
Retrieving Metal Materials by Means of Disused Hard Iron-bounded Alloy───酸溶法从铁基硬质合金中回收金属材料