This cosmic cannonball is challenging theories to explain its blistering speed.这个宇宙加农炮正在挑战解释其起泡速度的理论.Suddenly , a sporadic cannonball bombed in the battle field.敌人已经在城下骂阵了,我们却还是按兵不动.It must be a cannonball.那一定是一发炮弹....
The waters of the tropics are invitingly clear.热带水域清澈诱人。The sultry weather in the tropics encourages tourists to lead an indolent life.热带闷热的气候使得游客只能过懒散的生活.In the tropics plants grow to huge proportions.在热带，植物会长得非常高大。Hist...