您要查找的是不是：
- We all know that sound can travel through air. 我们都知道声能在空气中传播。
- Just how fast does sound travel through the air? 声音在空气中的传播速度究竟有多快?
- The mobile grocery carts travel through the lanes. 流动送货车走街串巷。
- To travel through or over;traverse. 经过或飞过；经过
- Do light waves travel through a vacuum? 光波真的通过真空吗?
- Travel through space is not a dream today. 航天旅行在今天已不是梦想。
- The mobile grocerycarts travel through the lanes. 流动送货车走街串巷。
- I still want to travel through Europe and to Asia. 我一直希望能从欧洲经由亚洲旅行。
- Sound travels through the medium of air. 声音通过空气这一媒介传播。
- Airplanes enable people to travel through the air. 飞机使人们能够在空中旅行。
- Sound waves cannot travel through a vacuum. 声波在真空中无法传播。
- To travel through or live in the woods. 穿越丛林或生活在丛林之中
- She has traveled through Europe. 她已游遍欧洲。
- To travel through or over; traverse. 经过或飞过；经过
- Sound waves will not travel through a vacuum. 声波在真空里不能传播。
- Some day we will travel through space. 有一天我们将在太空旅行。
- Airplanes enable people to travel through the air . 飞机使人们能够在空中旅行。
- Travel through space to other planets interests many people today. 现在很多人对去宇宙中其它行星旅行感兴趣。
- It was once believed that light waves traveled through the ether. 人们曾经相信光波在以太中穿过。
- Now let us see whether light can travel through water. 现在让我们看看，光是否能通过水传播。
