1、He jumped out of the plane and pulled the ripcord, and his parachute opened smoothly.
他从飞机上跳下来，拉开了降落伞，降落伞平稳地打开。

2、Before skydiving, they always check their parachutes to ensure they are in good condition.
在进行跳伞之前，他们总是检查他们的降落伞，确保它们处于良好状态。