A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.

一家公司计划开发一种原型除草机，它使用带有光学传感器和微处理器的刀片，通过颜色的深浅区别杂草和作物。

youdao

Structure of double-row blades can resolve the problem of mixing inefficient zone and improve mixing performance of interaction between machine member and concrete.

双排叶片结构较好地解决了搅拌低效区问题，改善了机构与混凝土相互作用的搅拌性能。

youdao

The blades are the key parts for the wind machine to receive wind energy.

风力机叶片是风力机接收风能的关键构件。

youdao

Besides the inevitable headaches that would come from trying to obtain permits to install a 25-story machine with blades that stretch 250 feet, such a turbine would generate more electricity than a typical store needs, Pool says.

FORBES: Walmart Erects Its First Megawatt Wind Turbine In California

This involves pitching the machine's nose up to reduce its forward velocity and increase the speed of rotation of the blades (and thus the amount of lift they provide) to soften the landing.

ECONOMIST: Monitor