It's dangerous to leave your children along while you go shopping.
购物时,把你的孩子单独留在家里是挺危险的。
They jumped at the unexpected noise.
他们因突如其来的声音吓得跳了起来。
On the occasions when they have pushed to shore an unconscious human being they have much more likely done it out of curiosity or for sport, as in riding the bow waves of a ship.