常见例句双语例句The first lasers to earn a wage did so by machining very hard materials, such as diamonds, or very soft ones, for example baby-bottle teats.激光第一次作此用途是加工硬度很高的材料，如钻石，或非常柔软的材料，例如婴儿奶瓶的奶嘴。 返回 bottle teats