Ples
(ple 的复数) abbr. 个性化学习环境（Personal Learning Environment）
🗣️ 情景例句
There's another advanced class today at four o'clock.
今天下午四点钟还有一次高级班。
A lazy sheep thinks its wool heavy.
懒羊嫌毛重
Because the Moon has only an eightieth of the Earth's mass,
因为月球的重量只有地球的1/8，