Fill a lightweight material with hot air, helium or hydrogen, and you have a vessel that floats in the air.
在容器中充入热气、氦气或氢气等轻气体，就能造就一艘漂在空中的飞船。
We've learned that piling up material goods cannot fill the emptiness of lives which have no confidence or purpose.
我们还认识到，没有信心和决心，堆积物质上的食物不能弥补生活上的空虚。
A thin, cushionlike mass of soft material used to fill, to give shape, or to protect against jarring, scraping, or other injury.
护垫，衬：薄的、象靠垫一样的柔软材料，用来填装、定形或防止挤压、刮擦或其它伤害。
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