After I relieved myself, another question occurred to me: since it was impossible for such a big library to have only one toilet, I had to ask someone about toilets.
2
完恭后,我又想,这么大的一个图书馆不可能只有这么一个厕所,我不得不去请教别人。
After rI relieved myself, another question occurred to me: since it was impossible for such a big library to have only one toilet, I had to ask someone about toilets.