Back then the cars had a trap door that we could pull open with a chain to check our tire wear.

Back then the cars had a trap door that we could pull open with a chain to check our tire wear.

那时的汽车有一个活板门，我们可以用链子把它拉开，检查轮胎的磨损情况。

-- Tim Flock 蒂姆·弗洛克