他是个胆小的、没勇气的可怜虫.He was a yellow gutless worm.他需要动用所有的职权防止那些胆小的志愿兵逃跑。He would need all his authority to keep the weak-kneed volunteers from bolting.我毫不怀疑那个胆小的家伙巴不得撒手退出呢.I had no doubt that the craven fellow would be only t...
Pear trees are grafted on quince rootstocks.梨树被嫁接到榅的根茎上。Such rootstocks or cultivars were reproduced true to type by vegetative propagation.这些钻木和品种,通过无性繁殖长成和亲本一样的类型.Apple orchards comprised mainly of standard trees on se...