Thallocenium
二茂铊(阳离子)
🗣️ 情景例句
Rock-a-bye, baby, on the tree top,
摇呀摇， 小宝宝， 在树梢，
How long does it take for a letter to get to California ?
一封信到加利福尼亚要花多长时间？
Well done, Wei Hua! Thank you, said Miss Zhao. I think it's time for us to start the lesson now.
“说得很好，魏华！谢谢，”赵小姐说，“我想现在该是我们学习课文的时候了。”