例句與造句

1. Before scuba divers plunge beneath the water, they usually mark their position with a red-and-white flag to signal boat operators to avoid the area.
2. To signal boats stopping or arriving, the port authorities used " budyong " or horns made from a carabao s ( water buffalo ) horns.
3. Rapid changes in direction or speed and escape tactics, such as underwater course changes and rapid surface swimming, should signal boat operators to slowly back off.
4. It's difficult to find signal boat in a sentence. 用signal boat造句挺難的