Mansfieldite
砷铝石
🗣️ 情景例句
and a book of photos about the United States still feels right.
而一本关于美国的摄影集仍然很有前景。
Don't underestimate the difficulties of the work.
不要低估了这项工作的限巨性。
Follow your teacher's instructions.
按照他/她告诉你的去做。