- 潜水
- dive
- 潜水
- go under the water
- 潜水艇
- submarine
- 潜水衣
- diving suit [or dress]
- 潜水衣
- wet suit
- 潜水员
- diver
- 潜水员
- frogman
- 镪水
- strong acid
- 签署
- sign
- 签署命令
- sign an order
- 谦逊
- modest
- 谦逊
- unpresumptuous
- 谦逊
- humble
- 牵挂
- worry about
- 牵挂
- care for
- 牵挂
- be concerned about