1. Both men had just begun to swim towards the shore, when they noticed with dismay that the speedboat was moving in a circle.
    两个人刚开始向岸边游去，就突然惊愕地发现快艇正在转着圈行驶，

2. To our dismay, we saw that there were snails everywhere:
    使我们惊愕的是门厅里到处爬满了蜗牛：

3. They stared at each other in dismay.
    他们沮丧地对望着。

4. Imagine their dismay when they found a beautifully-cooked wallet and notes turned to ash!
    可以想像他们发现一只煮得很好看的钱包，钞票已化成灰时的沮丧心情。