最后一道关口 Last line of a gate ; last hurdle
我知道一点关于俄国 i know little about russia
前煞与一些弯道的关系 BERM & RUT
我知道一些关于俄罗斯 I know something about Russia
关于一道概率题的商榷 College Mathematics
关于一个角度的道 An Angle on the Road
卫星的第一道关是需要一条低空运行轨道。
拱手相送看起来很简单，而在现实中，它却是最难恢复的一道关。
Offering something for nothing seems so easy, when in reality it can be one of the hardest things to recover from.
到了第一道关，我说，我家有一个小孩要喝奶，让我出去买点奶粉吧。
At the first one I said that I had a baby at home that needed to be fed and asked to be allowed to buy some milk powder.
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