Annual magnetic variations
[电] 岁磁变
🧩 词语组成解析
n. 变奏曲, 变更；变种（variation的复数形式）
🗣️ 情景例句
We can't get this bow tie tied.
我们打不好领结。
You must go to the moon. It's your duty.
你必须上月球去，这是你的职责。
Other types of bee make their nests in holes in the ground.
其他种类的蜂在地穴里筑巢。