英语语法分析

It is an economical, fast oil and gas exploration technique with promiseful future.

它是一种经济、快速、有前景的油气勘探方法。

Optical switch is an important functional device in optical fibre communication networks, MEMS optical switch is one of the most promiseful optical switches.

光开关是光通信网络的重要功能器件，MEMS光开关是最具发展前景的光开关之一。