He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

His way of speaking is monotone, and I can't feel any emotion at all.

I have my graduation ceremony tomorrow.

Next year, my younger brother will have his coming-of-age ceremony.

In order to find the empirical formula of this compound, you must first calculate the ratio of elements.

The Wade-Giles romanization is often used to express the pronunciation of Chinese.

It's difficult to decipher this chemical equation.