在线播放免费人成毛片乱码 ,日韩午夜男女乱婬真视频播放

【helpful to還是for】helpful to 和 heplful for 都有"有助于"的意思，但 helpful to 較常用于接sb，而 helpful for也可以接sb，但多用于接sth或doing sth，表示"對....有益" 。

例： Swimming is helpful for bones that are porous and weak.
游泳有助于改善骨質(zhì)疏松和骨骼脆弱。
This system has been experimented in practical business work, it is helpful for promoting working efficiency.
本系統(tǒng)已在實際業(yè)務(wù)工作中投入使用，有助于提高工作效率。
he assertiveness training is very helpful for improving one's social skill.
自信訓(xùn)練對提高社交技巧很有幫助。

helpful for sb 的情況(sb一般是第一/二/三人稱的主格或賓格)：
1、I think it's helpful for me to learn English well.
我認(rèn)為它有助于我把英語學(xué)得更好。
2、Don't throw it, it is helpful for us to repair the bike.
別扔了它，它對我們修自行車有幫助。
3、I hope the two wise scholars'ideas on learning can be helpful for you.
我希望，這兩位智者的思想可以在學(xué)習(xí)上對你們有所幫助。

help to sb的指向性較強，強調(diào)幫助的對向性，“什么”對“什么人”是“有用的、有幫助的、有益處的” 。
例：The following information may be helpful to readers.
下列信息可能對讀者有用。
This is written about me on the diagonal recurrent neural network procedures, may be helpful to you.
這是我寫的關(guān)于對角遞歸神經(jīng)網(wǎng)絡(luò)的程序，或許對你有所幫助。
But many believe that informal channels and conversations in the work place can be helpful to employers.
但許多人認(rèn)為，在工作場所的非正式溝通渠道和交談可能對雇主們有益。
The principles should be helpful to the designer of a new engine system.
這些原則要有助于新發(fā)動機系統(tǒng)的設(shè)計人。