八九不离十(bā jiǔ bù lí shí)to be pretty close; very near

Explanation

“八九不离十”指与实际情况很接近。一般常常出现在口语中。
“八九不离十” means to be very close to the actual situation. It often appears in spoken Chinese.
Words:

猜cāi:guess;
笔记bǐjì:note.

Sentences

1. Jiǎ：Zánmen de fāng’àn lǎobǎn yǐjīng pī le.
甲：咱们的方案老板已经批了。
A: Our program has already been approved by our boss.

Yǐ：Jiéguǒ gēn wǒ cāide bā jiǔ bù lí shí.
乙：结果跟我猜的八九不离十。
B: That result is pretty close to what I guessed.

2. Jiǎ：Nǐ jìde bǐjì wánzhěng ma?
甲：你记的笔记完整吗？
A: Is your note finished?

Yǐ：Bā jiǔ bù lí shí ba.
乙：八九不离十吧。
B: Almost done.