Chalkogenide
硫属化物
🗣️ 情景例句
Keep a small English dictionary with you at all time.
随身携带一本小英文字典。
Tell us about your post-purchase servicing.
告诉我们有关你们售后服务的情况。
To her horror he said that she was two hours too soon.
搬运工说她早到了两个小时，她听后大吃一惊。