subsonic hold

例句：

1. 1. The scientist held the subsonic object with a delicate touch.
   科学家用轻柔的手法握住了亚音速物体。
2. 2. During the test, the astronaut maintained a subsonic hold on the spacecraft.
   在测试期间，宇航员保持对飞船的亚音速握持。
3. 3. The engineer had to perform a subsonic hold to prevent the machine from overheating.
   工程师不得不执行一个亚音速握持以防止机器过热。