external observation

• 外部观察

external observation的用法和样例：

例句

1. What this means is that if you're designing a hauler, don't expect all the containers it transports to be visible from an external observer outside the ship.
   也就是，如果你设计了一艘运输船，船的外部观察者不能从外面看到它所装运的集装箱。