所有提交的文件必须真实且易于查证，这一点很关键。It is crucial that all documents presented are authentic and easily verifiable.儿童可能无法将自己的幻想与真实世界区分开来。A child may not differentiate between his imagination and the real world.他们都穿着田径服，似乎想掩饰他们的真实职能。...
Ventilation: positive downdraft exhaust ventilation should be provided to maintain vapor concentration below TLV.通风: 为了使气体聚集程度维持在阀极限值之下,应提供通畅的向下棋流排气通风设施.Water vapor from the evaporative recovery process may be recondense...
A child first labels the household pet cat as a 'cat' and then generalises this label to other animals that look like it.孩子会先把家中的宠物猫称为“猫”，然后将其他像猫的动物都称为“猫”。Results With both methods , two pet shampoos had excell...