Instability constant
[化] 不稳定常数
🧩 词语组成解析
🗣️ 情景例句
He's stepped out of the office for a little while.
他离开办公室刚一会儿。
She sent me a Christmas card last year.
去年寄过一张圣诞卡。
It could only get over the mountains if it rose to 10,000 feet.
只有在飞至10，000英尺的高度时，它才能飞过这些山头。