Recently, my lumbago has been so bad that I can't concentrate on my work.

Japan and China are strengthening their foreign commerce relationship.

We are engaged in international trade with America.

I've had a toothache since last night and couldn't sleep.

I have been to Nantong.

He is an amazing polyglot who can speak five languages fluently.

This book contains a lot of rare words.

I will explain this matter in detail in the future.

I will inform you of the details at a later date.

My grandmother's forty-ninth day is next week.