事实：金星上一天竟比金星上一年要长-A Day on Venus is Longer Than a Year on Venus
时间：2018-12-19 作者：英语课 分类：Facts-事实
英语课
Pre-Listening Vocabulary
revolution: to go around something (Earth revolves 2 around the Sun.)
rotation 3: the spinning of something (Venus’s rotation is backwards 4.)
axis 5: a real or imaginary line that something rotates on
retrograde: in a backwards movement
A Day on Venus is Longer Than a Year on Venus
The scientific definition of a year is the amount of time it takes for a planet to make one revolution around the Sun. Earth’s neighbouring planet, Venus, takes 225 Earth days to revolve 1 around the sun. The definition of a day is how long it takes for a planet to do one complete rotation on its own axis. It takes Venus 243 Earth days to do this. In other words, a day on Venus is longer than a year on Venus. The rotation of Venus on its axis is retrograde. It rotates in the opposite direction of Earth and the other planets in the Solar System (Uranus spins on its side).
1 revolve
vi.(使)旋转；循环出现
- The planets revolve around the sun.行星绕着太阳运转。
- The wheels began to revolve slowly.车轮开始慢慢转动。
2 revolves
v.（使）旋转( revolve的第三人称单数 )；细想
- The earth revolves both round the sun and on its own axis. 地球既公转又自转。 来自《现代汉英综合大词典》
- Thus a wheel revolves on its axle. 于是，轮子在轴上旋转。 来自《简明英汉词典》
3 rotation
n.旋转；循环，轮流
- Crop rotation helps prevent soil erosion.农作物轮作有助于防止水土流失。
- The workers in this workshop do day and night shifts in weekly rotation.这个车间的工人上白班和上夜班每周轮换一次。