happened
/ˈhæpənd/ 120take place; occur. "two hours had passed and still nothing had happened"
verb [vi. 不及物动词]发生（happen 的过去式及过去分词）
Mechanization happened years ago on the farms of Islay.
数年前，艾莱的农场就实现了机械化。
单词造句:
Mechanization happened years ago on the farms of Islay.
数年前，艾莱的农场就实现了机械化。