Well, maybe you'll come for lunch some Sunday,so we can really thank you for bringing Richard's bag back.
既然如此 或许哪个星期天你能来吃中饭让我们好好地感谢你送回Richard的旅行袋。
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。