1 ADJ 不透水的;水密的 Something that is watertight does not allow water to pass through it, for example because it is tightly sealed. 不透水的;水密的
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The flask is completely watertight, even when laid on its side.
即使平放，这个真空水杯也是滴水不漏。
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The batteries are safely enclosed in a watertight compartment.
电池被安全地置于一个防水的隔间里。
SYN waterproof, hermetically sealed, sealed, water-resistant
2 ADJ-GRADED (事实、论点或协议)严密的，无懈可击的 A watertight case, argument, or agreement is one that has been so carefully put together that nobody will be able to find a fault in it. (事实、论点或协议)严密的，无懈可击的
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The police had a watertight case. They even got his fingerprints from that glass cabinet.
警方找到了确凿的证据。他们甚至在那个玻璃橱柜上提取到了他的指纹。
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...a legally watertight agreement.
严密规范的协议
SYN foolproof, firm, sound, perfect
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