Dogs love splashing in mud and hippos wallow in it.狗喜欢在泥水洼里扑腾，河马则喜欢在其中打滚撒欢儿。Hippos are unable to submerge in the few remaining water holes.在仅剩的几个水坑里，河马根本无法没入水中。hippos wallowing in the river在河里打滚的河马...
He is an enthusiastic skier.他是个滑雪爱好者。The skier's brilliant performance earned him the highest score of the day.那位滑雪者出色的表演使他赢得了那天的最高分.She is a skier who is unafraid of danger.她是一名敢于冒险的滑雪者....
The earth-moving trucks and cement mixers lay idle.运土卡车和混凝土搅拌机闲置着。Generators, cement - mixers, air compressors shook the ground.发电机 、 混凝土搅拌机和空气压缩机的吼声,震荡山谷.Separation is obtained by means of a series of mixers and settler...