Proctanal
肝素胆碱
🗣️ 情景例句
If I fail this exam I'll fail the course.
我要是考试没通过，这门课就没学分了。
It is convenient to know the language.
掌握这门语言会带来方便。
It's time I went and picked up my little girl from school.
我该去学校接我的小女儿了。