Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

Let's cherish every encounter with the spirit of 'once in a lifetime'.

Let's solve this problem with unity in diversity.

In our body's cells, there are two types of chromosomes: autosomes and sex chromosomes.

Sex chromosomes play an important role in determining the sex of an organism.

He was struggling to understand the concept of a hypercube.

He is good at reading Simplified Chinese.

This medicine contains saccharides.

The pineal gland, or 松果體, is a part of the brain that secretes hormones.