精讲课 笔记随视频锁定
波浪的存在形式

右侧笔记支持独立滚动。边听名师连读拆解,边对照右侧的语法事实与统计数据笔记。

An ocean wave passing through deep water causes a particle on the surface to move in a roughly circular orbit, drawing the particle first towards the advancing wave, then up into the wave, then forward with it and then -- as the wave leaves the particles behind -- back to its starting point again.

particle n. [C] a very small piece of sth. 微粒

  • There’s not a particle of truth in what he said. 他所说的话中没有一丝事实。
  • Have you ever gotten a piece of sand or dirt or other small particle in your eye? 你曾经有过沙子、灰尘或其他小颗粒进入眼睛的经历吗?
  • The energy of a light photon or particle is different for each color. 可见光子或粒子的能量因颜色不同而不同。
dust particles 尘埃微粒;粉尘 You can see dust particles dancing in the sunlight streaming through the window. 你可以看到尘埃微粒在透过窗户射进来的阳光中飞舞。
tiny particles of soil 极小的土壤颗粒 Plants absorb nutrients that are attached to tiny particles of soil. 植物吸收附着在极小土壤颗粒上的养分。

passing through deep water 穿过深水区

  • The submarine was detected while passing through deep water far from the coast.这艘潜艇在远离海岸的深水区穿行时被侦测到。
  • The energy of the storm remained intact while passing through deep water.风暴的能量在穿过深水区时保持完整。