crew size

例句：

1. 1. The new ship has a crew size of 300.
   这艘新船的船员人数为300。
2. 2.The captain needs to know the crew size for safety reasons.
   船长需要知道船员人数以确保安全。
3. 3. The crew size is crucial for the success of the mission.
   船员人数对于任务的成功至关重要。