化石燃料（如煤和石油）属于有限资源。The fossil fuels (coal and oil) are finite resources.如果受到损伤，神经细胞再造的能力有限。Nerve cells have limited ability to regenerate if destroyed.关键是奖学金有限。The fact of the matter is that student finances are stretched...
She has carved a niche for herself as a comic actor.她作为喜剧演员已经闯出了一片天地。Simon Lane quickly found his niche as a busy freelance model maker.西蒙·莱恩很快找到了适合自己的位置，成了一名忙碌的模型制作的自由职业者。He eventually found his niche in sports journali...
Brian was whirling like a dervish, slapping at the mosquitoes and moaning.布赖恩如同旋转舞蹈的托钵僧一样转来转去，一边拍打着蚊子一边抱怨不停。His thoughts churned chaotically in his brain like snowflakes whirling about in the north wind.头脑里,情思弥漫纷乱像个北风飘雪片...
Some Puerto Ricans feel that for those reasons Puerto Rico should become the 51 st State.一些波多黎各人们认为对于这些原因波多黎各应该成为第51个州.Only a short campaign took place in Puerto Rico, but after the war Spain ceded the island to America....