It was pointed out that semiconductor laser has advantages such as high power, effective vaporization and simple usage than other types of lasers.
半导体激光器较之其他类型激光器有功率大、汽化效果好、操作简单等优点。
2
Besides the raw materials needed to produce industrial goods, an industrial society must have reliable sources of power, effective means of transportation, and skillful people to operate factories.