脑部受损的病人常会产生幻觉。Hallucination is common in patients who have suffered damage to the brain.那个女孩是他的幻觉，是他那忧郁不安的头脑妄想出来的。The girl was a mirage, cast up by his troubled mind.焦虑或抑郁的人吸毒后可能会有非常糟糕的幻觉。An anxious or depressed person c...
Sawdust was used as a hygienic floor covering.锯屑曾被用来铺在地上保持地面清洁卫生。Food must be prepared in hygienic conditions.食物必须在卫生的环境中制作。It's more hygienic to use disposable paper tissues.使用一次性餐巾纸更为卫生....
Global ecological efforts can easily be at odds with local ecologies.全球性生态保护工作很可能会和地方生态系统存在矛盾。Temperature records have unequivocally confirmed the existence of global warming.气温记录清楚无疑地证实了全球气候正在变暖。It is high time to consi...