三叶期的英文：
trefoil stage
trefoil是什么意思：
n. 车轴草,三叶形
A black figure shaped like a trefoil or clover leaf on certain playing cards
梅花某些游戏纸牌上的一种黑色图案，类似三叶形或苜蓿叶形A third or Armenian type is seemingly represented by the head of a bearded man wearing a trefoil-decorated robe.
第三类或亚美尼亚人外观上以身披饰有三叶草长袍、满脸胡须的头部雕塑为代表。 A third or armenian type is seemingly represented by the head of a bearded man wearing a trefoil-decorated robe
第三类或亚美尼亚人外观上以身披饰有三叶草长袍、满脸胡须的头部雕塑为代表。stage是什么意思：
n. 阶段；舞台；演员的职业；事件发生地；站，架，层；上演
v. 上演；举行；展现；筹划
As the elapse of time, their feeling warms up stage by stage.
随着时间的推移，他们的感情逐步升温。stage well [Badly]
很[不]适于上演 She was mad about the stage.
她狂热地迷恋着舞台生活。This theatre has a revolving stage.
这家戏院的舞台是旋转式的。The novel is being arranged for the stage.
