中间为a的是常用,中间为the的是特指 .
take a taxi和take the taxi都可以。
I was forced to take a taxi because the last bus had left.
最后一班公共汽车已经开走，所以我只好坐了一辆出租汽车。
We\'d better take a taxi.
我们最好乘出租车。
The hotel had a taxi waiting to collect us.
旅馆召了辆出租车等着接我们。
水利万物而不争,
而万物莫能与之争。
