Radiostrontium
n. [化] 放射性锶
🗣️ 情景例句
This one really brings back memories.
这一张的确唤起了许多的回忆。
My sister graduated from high school.Graduation was last night.
我的姐姐从高中毕业了.毕业典礼是昨天晚上。
Sending a fax is more expensive than posting a letter, but much quicker.
发传真比寄信要贵些，但是要快得多。