运河上捕鱼的最佳地点是靠近水闸的地方。The best place to catch fish on a canal is close to a lock.然而, 现代捕鱼的方法, 使得越来越多的鱼被捕获.Yet, with modern fishing methods, more and more fish are caught.在一些长期捕鱼的海域, 生物量在此之后又减少了一半.In some long fished areas, ...
Butane and butylenes has the same characteristic with propane and propylene.丁烯与丁烷表现出与丙烯、丙烷相似的特性....replaceable butane gas cartridges.可替换丁烷气贮气瓶The butane conversion of catalyst aged in different pH has similar value.在不同pH...