Another new air route has been opened up.

又有一条新航线开航了。

The documents shall not be forwarded by air route unless the contract of sail so provides.

除买卖合同有规定外，单据不用航空寄递。

Normally these would be geographically adjacent or able to be served, say, on an air route.

通常这将是在地理上相邻或能够送达，也就是说，在空中航线。

The natural obstacles that affect flight safety on air route shall be marked on aeronautical charts;

第八十五条航路上影响飞行安全的自然障碍物体，应当在航图上标明；