Equidensitometry
等密度测量
🗣️ 情景例句
Tell me about your educational background.
告诉我你的学习背景。
The remembrance of past sorrow is joyful.
记住过去的不幸使人愉快。
Though he was reluctant to do so at first, we eventually persuaded him to take us.
一开始，他很不愿意，但经劝说，终于同意了。