大多数厂商都使用活性碳收集器.Most manufacturers use a charcoal canister.已经设计出的污染微粒收集器可将大部分有害微粒从废气中分离出来.Particulate traps have been designed that will remove most of the particles from the exhaust gas.用直径30毫米的球形收集器,可以更准确地测定花粉的总量.The to...
He made substantial donations to charity...他为慈善事业捐了很多钱。Some donations are already trickling in.一些捐赠已经陆续到来。Donations came from all kinds of people...捐赠来自于各界人士。Charities appealed for donations of food and clothing for vict...