Though they're challengeable and great to one's mind,they're discussing.
Though they're challengeable and great to one's mind,they're discussing.
虽然它们富有挑战性，对人的心智成长很有利，但是它们还是很难缠的。
Though they're challengeable and great to one's mind,they're discussing.
虽然它们富有挑战性，对人的心智成长很有利，但是它们还是很难缠的。