Ectogene
外因
🗣️ 情景例句
Daddy, can we go soon?
爸爸 ，我们能快点走吗？
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
The journey is so smooth that there is nothing to prevent you from reading or sleeping.
旅途平稳，丝毫不妨碍你阅读或睡眠。