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。
2
After the presentation, a keeper showed them how to hold the bottle of milk for baby squirrels.
展示结束后，饲养员向他们展示了如何为小松鼠拿奶瓶。
3
A decade ago, the American Society for Reproductive Medicine launched an AD campaign featuring a babybottle inside an hourglass, and it sparked a firestorm of criticism.