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1.engaged in 参加
The soldiers were engaged in a military operation close to the Ugandan border.
这些士兵参加了乌干达边境附近的一次军事行动。
2.battle against 抗争
All the villagers, men and women, old and young, took part in the battle against the drought.
全村不论男女老幼，都参加了抗旱斗争。
3.in service 工作
The plane has been kept in service far longer than originally intended
这架飞机已经超期服役很长时间了。
4.a spectrum of 连续的
This creates a spectrum of colours at the edges of objects which blurs the image
这在物体的边缘形成了一道色谱，使图像变得模糊不清。
5.common sense 常识
He lacked any of the practical common sense essential in management.
管理方面基本的实用常识他一点也不懂。
