So don't buy cheap or weak locks.

也就是说，不要买便宜或者不坚固的锁。

" Those who have control of the purse strings … they're very reluctant to move away from these solid engineering structures because of fear that their money's going down a hole, " said Kench.

“那些控制资金的人… … 他们非常不愿意放弃这些坚固的工程结构，因为他们担心他们的钱会，”肯说。

The walls of his chest seemed to thrill and quiver as a frail building would do inside when some powerful engine was at work.

他的胸腔微微震动，就象在一座不坚固的建筑中，开动了一架强力的机平时的情形一样。

Nobody could break in without breaking the strong latch in two.

没有人能在不弄断那坚固的门闩的情况下闯进来。

You've got a light wave shining onto a wall, and imagine this wall is solid and opaque, except for having a bunch of very thin evenly spaced slits that the light can pass through.

你有一束光波照射到一堵墙上，想象这堵墙是坚固且不透明的，除了上面有很多非常细小且均匀分布的缝隙， 光线可以通过这些缝隙。