current ripple

例句：

1. 1. The current is strong enough to carry the boat.
   水流足够强大，可以托起船。
2. 2. The current of the river flows through the town.
   河流的水流穿过这个城镇。
3. 3. The current of the ocean is so powerful it can erode cliffs.
   海洋的水流如此强大，以至于能侵蚀悬崖。