He continued to search for Shangri-La throughout his life.

He was diagnosed with glycogenosis.

My keys are inside the house.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

We should save electricity for energy conservation.

We should increase the use of alternative energy to protect the earth.

The potential energy of this ball is large because it is in a high position.

The potential energy of this ball is proportional to its height.