Catecholborane
儿茶酚硼烷
🗣️ 情景例句
I can't show my face in public anymore.
我不能再在公众场合露面了。
Open your books and turn to page 20.
打开书，翻到第20页。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打电话向女儿求援，说她碰到了一点儿小麻烦。