网络释义专业释义
...自定义的值类型不能有基类，但可以实现一个或者多个接口。同样值类型不能用于作其他引用类型和值类型的基类，因为值类型是隐式密封的（Sealed），也意味着值类型不能派生出其他类型。由于值类型不能用于派生其他类型相比引用类型，值类型就少了每个引用类型对象开头所包含的...
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双语例句原声例句
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这个瓶子是密封的，标签上写着“纯净水”。
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在能源价格低廉的年代，房屋建筑商并不太担心未密封的裂缝。
Back in the days when energy was cheap, home builders didn't worry much about unsealed cracks.
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如果贮藏在密封的容器里，食物能保持比较久的时间。
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Yes, and if we have gases involved, it's pretty similar, but now what will have is something like this. We'll have a reaction vessel that's sealed, it's constant volume.
如果涉及了气体，情况也很相似，只是现在的装置是这样的,我们有一个密封的反应容器,它的体积是恒定的。
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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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