Edible films needed to be sealed when used as a packaging bag.
可食用膜作为一种软包装材料,需要对其进行封口制袋。
Katayev had marked one box of documents to be sealed for a number of years.
Katayev在一个文档盒上注明此盒应被封存多年。
These areas are supposed to be sealed off, but sometimes the seal is ineffective.
有时我们认为采空区已封闭了,但可能并未有效封闭。
So it's important to realize the role of ceramics; they need to make storage jars that could be sealed very well and preserve the stuff for a very long time, and indeed, they did that.
从中希腊人意识到陶艺的重要性,他们需要烧制可以密封得很好的,可以用来长久保存食物的陶罐,他们也的确这样做了
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