The pricipal objective in designing cyclones is to create a vortex.设计旋风除尘器的主要目的在于造成涡旋运动.Middle - latitude cyclones originate at the popar front.中纬度 地区的气旋发源于极锋.For particulates, the favored devices are inertial impactors,...
Anthocyanidin synthesis needs proper temperature and oxygen, which will fail at low temperature or deficient oxygen.花色素的合成需要适宜的温度和充足的氧气, 低温或缺氧不利于花色素的合成.They wooed customers by offering low interest rates...他们靠提供低息来招揽客户。W...