関連ワード:  is it easier to learn a third language    is it easier to learn a third language after a second    is it easier to learn a third language than a second    is it easy to learn a third language    is it easy to learn a foreign language    is it easier to learn a second or third language    would it be easier to learn a foreign language at an early age    is it hard to learn a third language    is it good to learn a third language    is it easier to learn to read or speak a foreign language  
結果 : is it easier to learn a third language