lightened
v.
使（某物）更明亮( lighten的过去式和过去分词 );
变得更光明;
例句:
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As they approached the outskirts of the city, Ella's mood visibly lightened.
他们快到市郊时，埃拉的情绪明显好转。
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He pulled the lightened sled with all his strength.
他用尽全力拉减轻了重量的雪橇。
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Her existence was lightened by bits of gossip.
她的生活靠了飞短流长才不那么乏味。
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Should they have lightened up, felt flattered?
来自THETIMES
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No beam of sun lightened the dull blackness of the clouds.
来自F. O
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Subsequent albums lightened the sound only slightly, but became ever more electric.
来自BBC