你聽完後恐怕還是半信半疑。但如果是你的朋友向你推銷，很可能只要簡單說上

After listening to you I am afraid or skeptical. But if you sell to your friends, it may simply says, "I used this, very good", you will be convinced. This difference is word of mouth marketing effectiveness of most places.

你聽完後恐怕還是半信半疑。但如果是你的朋友向你推銷，很可能只要簡單說上「我用過這個，很好用」，你就會完全相信了。這種差別就是口碑行銷最有效力的地方。

I'm afraid you'll be dubious after listening. But if it's your friends who sell to you, it's likely that you'll believe it if you simply say, "I've used this, it's easy to use it.". This difference is where word-of-mouth marketing is most effective.