He is studying the shape of the inner lip of the shell.

Learning the rules of the new kana is difficult.

No, that is incorrect.

If you rephrase that complex theory in simpler terms, it's just common sense.

This apple contains poison.

This letter will be relayed.

This train is a direct service to Ye.

His character affects all the people he is involved with.

Could you understand that point?

Hypervitaminosis occurs when the intake of vitamins is too high.