滑滑板时带护肘和护膝是必要的.Elbow pads and knee pads are essential on a skateboard.不要在路上玩滑板或溜冰.Don't skateboard or roller skate on the road..滑板由操作台控制.The sledge was steered from a platform....
With their fleece sopping wet, they huddled in hollows, too dispirited to graze.在皮毛打湿的情况下, 他们挤在低洼处,靠近黑莓丛,或者躲在背风坡上, 毫无觅食的情绪.Mercury is covered in craters - hollows made by huge space rocks crashing into it.水星的表面有许多陨石坑,这些坑...