Ludox
硅溶胶
🗣️ 情景例句
Get it?
明白吗？
That's OK.
没关系。
In the evenings he studied hard for his exams, and most mornings he took tourists around Oxford.
他晚间努力学习，以应付考试，而大多数早上，他则带领游客在牛津大学参观。