n.井,煤矿,麻子,（赛车道旁的）修理加油站 vt.使有麻子,使有凹陷 vi.凹陷,起凹点
A gold mine is not a bottomless pit, the gold runs out.
金矿并非无底的宝藏，金子终究会被采光。
He was convicted of failing to muzzle a pit bull.
他因没能给比特犬戴嘴套而被判有罪。
He had to make four pit stops during the race.
他不得不在比赛过程中4次停车进站。