This kind of plastic is made of gallnut.这种塑料是用五棓子做原料制成的.To study the optimal process of the extraction of tannic acid from Chinese gallnut.从五倍子中提取单宁酸,通过正交实验优化筛选出最佳工艺....
An observant doctor can often detect depression from expression, posture, and movement.善于观察的医生常常能从人的表情、姿势以及动作诊察出抑郁症。You should be observant of the traffic rules.你应该遵守交通规则.Observant husbandmen usually hate some of the adv...
The promotion he had been promised failed to materialize.答应给他晋升的许诺未能实现。The rise in share prices failed to materialize.股价没有上涨。The domed cities and flying cars we expected have failed to materialize.圆顶城市和会飞的汽车并未出现.I don’t ...