纵观奥运赛事，来自非洲十几个国家的运动员在赛跑、足球、游泳以及皮滑艇等项目上都取得了奖牌。
In all, athletes from more than a dozen African countries won MEDALS in events ranging from running and football to swimming and kayaking.
夏天，有些地方的山坡上没有雪，这时人们喜欢进行滑草运动。
Grass skiing is popular in some places during the summer when there is no snow onthe slopes.
登山运动员可以在靴子上捆上尖钉，这样有助于在很滑的陡坡上站住脚。
Climbers can strap sharp nails on to help get a foothold on a slippery slope.
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