苦干的英文：
bang away
blow one's brains out
fag
fag away
grind
grind away at
labo(u)r
labor
labour
slog
sweat blood
toil
toil at
tug

参考例句：

To exert oneself.
苦干使自己苦干

To exert(oneself.
使(自己)苦干

Pull one's punches; be reckless
拼命苦干;驱赶

If you want to pass that exam, you'll have to knuckle down (to some hard work)
你要想考试及格,就得开始下功夫(苦干)了

To labor continuously;work strenuously.
苦干不断地劳动;辛苦地工作

College tutors do indeed work; they drudge
大学助教们的确在干工作;他们在苦干。

I really admire her indomitable optimism and can-do spirit.
我实在佩服她不屈不挠的乐观态度和苦干的精神。

labour with patience
耐心地苦干

His success was by dint of hard work.
他凭苦干获得成功。

She has an enormous capacity for hard work.
她有苦干的巨大能力。

bang是什么意思：
n. 重击；巨响；刘海
v. 重击；发巨响
adv. 正好；完全地

bangs; a fringe
刘海儿

He was awakened by a terrific bang.
一声巨响把他从睡梦中惊醒。

She is keeping a long bang.
她现在是留着长刘海。

away是什么意思：
adv. 在远处；离开，远离；消失

to kick away; to spurn away
一脚踢开

to die away; to fade away; to vanish; to elapse; to wear away
消逝

She barked the boy away.
她把那男孩喝走了。

blow是什么意思：
v. 吹，刮；吹动；吹响；吹出；（使）爆炸；泄露；开花；吹牛
n. 重击；打击；吹动；吹牛；开花

It is blowing hard.
风刮得很大。

do not deny that is a serious blow.
我不否认那是严重的一击。

He goes for a blow.
他走出外吹吹风。