1·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。
2·They receive oil through pipeline gathering systems from production tanks and relay it to trunk line stations.
它们通过管道集油系统从生产罐接受原油，并把它转输到干线泵站。
3·There are many reverse impacts on environment around pipeline route caused by construction and operation of petroleum trunk line.
石油工业干线管道的建设和运营给沿线周围环境带来了诸多不利影响。
4·It is very important to describe the performance curves of centrifugal compressor by mathematical model accurately for the automatization design and management of gas transmission trunk line.
对于输气干线的自动化设计和管理来说，用准确的数学模型描述离心压缩机的特性曲线至关重要。
5·The method of design and calculation on in-line welding branch pipeline for gas transmission trunk line is introduced.
介绍了干线输气管道热连接分支管道的设计计算方法。