Gullies, streaks, ripples and dust devil tracks on Russell Crater Dunes.沟壑, 条纹, 波纹和沙尘暴,罗素环形山沙丘轨道.Near the end of the movie, the base of the dust devil becomes much wider.在影片的结束部分, 旋风的基部变得很宽.The dust devil column is clear...
The money saved could be used for more deserving causes.省下来的钱可以用于更有意义的事业。to give money to a deserving cause把钱捐给值得赞助的事业All the causes seem equally deserving.看来所有的这些事业都同样值得投身....