Sker
(SK 的比较级) [医] 链球菌激酶, 链球菌致活酶
🗣️ 情景例句
What if we can't tie the tie?
如果我们弄不好领结怎么办？
He has been to America.
他曾去过美国。[表示曾经有过的经验]
He asked very politely, Excuse me, have you got any books about the moon and the stars?
“请问，你有关于月亮和星星的书吗？”