辛勤努力的英文：
slave
He succeeded by dint of hard work.
他通过辛勤努力获得成功.
They enjoy the fruits of their hard labor.
他们享受自己辛勤努力的成果。
Success lies not so much as in luck as in hard work.
与其说成功在于运气不如说是辛勤努力。
n. 奴隶；完全被控制的人
v. 苦干
a trafficker in slaves
奴隶贩子
His grandfather used to be a slave.
他的祖父曾是奴隶。
He's a slave to drink.
他是个酒鬼。
They did their best to liberate slaves.
他们尽最大的力量去解放奴隶。
The slave owners forced the slaves to fight against each other in the wrestling ring.
奴隶主强迫奴隶在角斗场上自相残杀。