体型大的生物由于行动慢, 不可能猎取到动物性食物.With very large organisms that are now relatively sluggish, animal food cannot be caught.素食者不吃任何动物性食物,易患维生素B12缺乏症.Vegans consume no animal products and are susceptible to vitamin B 12 deficiency....
除了两个人在机房值班外，其他人都在睡觉。Apart from two men on watch in the engine-room, everyone was asleep.这名司机被安排在星期日值班。The driver was rostered for Sunday.值班的护士担心病人的病情会恶化.The nurse on duty was fearful that the patient should get worse....