helpful to的用法和樣例：
例句
- It is not so helpful to give someone some bread as to teach him how to make a living.
與其說給人麵包很有幫助，倒不如說教導他如何謀生才重要。 - The experience in army is helpful to him.
他從軍的經歷對他很有用。 - Maybe these nutrients are helpful to your health.
或許這些營養品對你的健康有幫助。 - These tactics are unlikely to be helpful to you.
這種方法對你未必有用。
