在这10年之间, 铁路运货车厢有了冷藏和加温设备, 以保存容易变坏的产品.But during that decade, railroad cars were refrigerated and heated , helping preserve perishable goods.防止啤酒变坏的主要方法是用纯酵母菌株发酵.The principal methods of avoiding spoilage are the use of p...
He was ever careful to check his scripts.他一向都认真检查剧本。I drove gingerly past the security check points.我战战兢兢地开车经过安检站。Flange Insert valves are the ultimate check valves in flanged systems.法兰插入式阀门是法兰阀门系列中最佳的止回阀.The disease wa...