质量守恒定律 自然界的基本定律之一 law of conservation of mass 质量守恒定律一般指物质守恒定律(自然界的基本定律之一) Law of conservation of mass generally refers to the law of conservation of matter (one of the fundamental laws of nature) 拉瓦锡, 现代化学之父 Lavoisier ...
compass a device for determining directions by means of a magnetic needle or group of needles turning freely on a pivot and pointing to the magnetic north magnetic north 英 美 & ...
The device is named after Sir Isaac Newton and is also known as Newton’s pendulum, Newton’s rocker, and more casually, Newton’s balls. Newton’s cradle, apart from being an elegant decorative piece, also demonstrates two very important and fundamental laws of physics, namely the law of conser ...