柯林斯詞典alternation /???lt??ne???n/ 1. N successive change from one condition or action to another and back again repeatedly 交替 返回 alternation劍橋詞典a situation in which one thing repeatedly happens or exists after another 輪流，交替 Flowers and trees are planted to produce an attractive alternation of light and shade in the garden . 種植鮮花與樹木以期在花園里營造光影婆娑的動(dòng)人景致。 返回 alternation