斑驴是一种极美丽的斑马变种。The quagga was a strikingly beautiful variant of the zebra.人类既不能创造变种, 亦不能阻止变种发生.The man can neither originate varieties, nor prevent their occurrence.新形成的变种或许会从它的祖先遗传来某些特性的差异.The newly - formed variety woul...
我心事重重地向车子走去。I walked on in a reflective mood to the car.他只顾想着心事，没注意到有什么不对。He was too preoccupied with his own thoughts to notice anything wrong.与咨询员的谈话让他将心事一吐为快.His visit to a counsellor really helped him get thingsoff h...