动词 hold in:

1. close in; darkness enclosed him"

2. lessen the intensity of; temper; hold in restraint; hold or keep within limits

3. hold back; keep from being perceived by others

holdupn.持枪抢劫；停顿；延迟holdv.拿着；控制；容纳；握住；持有；保持；掌握；认为；举行n.握住；控制；把握；立足点；延误；影响hold up an umbrella打伞hold someone in awe敬畏某人hold-up to mockery嘲笑<人、物>Hold your head erect把头挺直。hold a demonstration举行游行示威hold On the receiver别挂断电话hold the fishing rod持钓竿Hold the brush so.这样拿着扫把hold back the effort适当控制力量hold someone in play使某人工作下去

1. The soundtrack is not in sync with the picture.
   声迹与画面不同步。
2. Synchronisation works in both directions.
   同步操作是双向的。