A slalom course should be 3000 meters at least .

激流回转水道至少3000米长。

How was he going to do a slalom .

他打算怎么做绕桩？

Of or relating to competitive downhill racing and slalom skiing events .

下坡障碍赛的竞争性的下坡赛跑和障碍滑雪比赛，或与之有关的。

Giant slalom is seldom seen here .

大回转比赛在这儿不多见。

Slalom canoeing is held on a whitewater course .

划艇回转赛在激流水道上进行。