The machines will be made of the best materials and the stipulations of the contract be strictly observed.
机器将用最好的材料生产,合同的规定也将得以严格履行。
It must have been a gas that could burn but that would not explode, a gas that did not smell strong, and a gas that did not kill people.
它一定是一种能够燃烧而不能爆炸的气体,一种味道不很强的而且不使人致死的气体。