Biotron
[计] 高跨导孪生管
🗣️ 情景例句
Michelle, can I help you with the lemonade?
Michelle，我帮你倒点柠檬汁好吗？
Where have you been all this time?
这段时间你跑到哪里去了？
How long has Kate been at her school?
凯特进校学习有多长时间了？