observe

Beispielsätze

• Scientists have observed a drop in ozone levels over the Antarctic.

  科学家已经观察到南极洲上方的臭氧浓度有所下降。

• Predators have been observed to avoid attacking brightly coloured species.

  据观察发现，食肉动物会避免袭击色彩鲜艳的物种。