每当厨师挑剔我干的活儿时，我都非常沮丧。I was disappointed whenever the cook found fault with my work.销量仍在，但购买者更加挑剔。Sales still happen, but buyers are more selective.我们就别太挑剔了。Let us not cavil too much....
燃烧剂和氧化剂分别为煤油和液氧.The fuel and oxidizer are kerosene and liquid oxygen, respectively.汽化器把液氧转化成气态.Vaporizers convert the liquid oxygen into a gaseous state.如果皮肤接触到液氧, 脱掉任何可能限制冻伤区域血液循环的衣服.For skin contact, remove any clothin...