许多理论都标榜以单一的原因解释生长.Many theories purport to explain growth in terms of a single cause.所有喇叭都接在单一的扩音器上.All the speakers hook up to a single amplifier.单一的 、 孤立的磁极从来未找到.A single, isolated magnetic pole has never been found....
Courtship is somewhat vocal with a lot of displaying by the male.雄性动物在求偶时会尽量展示自己，并发出一些声响。A piece of clothes is displaying in the shop.一件衣服正在这家商店展览.The peacock is displaying its fine tail feathers.这只孔雀在展示自己美丽的尾部羽毛....
Mind trainers are now part of a tennis star's retinue.现在，网球明星的随行人员中有些是心理培训师。This was the man whom other trainers love to carp about.这就是老被其他教练挑毛病的那个人。Most of the top British trainers were at the ringside.英国最顶尖的教练大都坐在...