Like any highway system, the federal airways have their main trunk line.

同任何公路系统一样，联邦航空线路也有其主航线。

Split the lateral surfaces with the a curve following the trunk line on top view.

斯普利特的横向表面的曲线后，干线上的看法。

At the junction of a branch line and the trunk line, the wires must be spliced together.

在支线和中继线的接合点，电线必须被叠接起来。

Our spinal cord is not merely a trunk line transmitting phone calls from the brain. It too thinks.

我们的脊髓不仅仅是传递大脑指令的“电话干线”，它也能思考。

Nearby is a child of four, in a khaki suit, who represents the merger of two trunk line railways.

旁边一孩童，年仅四岁，身着咔叽套装，却已是两条铁路干线联合公司的法人。