1. The rules state that samples must be enclosed in two watertight containers. 条例规定样品必须用两个不漏水的容器封装起来。
2. If she could just establish the time the picture had been taken, Mick would have a watertight alibi. 只要她能确定拍这张照片的时间，米克就可以有一个无懈可击的不在现场的证据。
3. Only teak matches oak's expansion coefficient and stays watertight. 只有柚木才能达到橡木的膨胀系数，并保持水密性。
4. The bark was stretched over frames made from tree branches, stitched together and sealed with resin—you know that the sticky liquid that comes out of the tree—and when it dries, it's watertight. 树皮在用树枝做好的框架中被拉长、延展，然后缝合在一起并用树脂密封好，就是那些从树中流出的黏黏的液体。当它干了以后就不漏水了。
5. The case has to be made watertight. 案由必须做到无懈可击。
