inside and out 内外都；彻底地
from outside to inside 从外到内
look outside and in 从外部和内部观察
know something inside and out 彻底了解某事
examine outside and in 全面检查
1. The teacher explained the machine outside and in.
老师从外部和内部详细解释了这台机器。
2. We studied the building outside and in before the renovation.
改造前，我们全面研究了这栋建筑。
3. She knows the company outside and in after many years of work.
多年工作后，她对这家公司了如指掌。
A: Did you check the new office outside and in?
A：你全面检查了新办公室吗？
B: Yes, I looked at every part carefully.
B：是的，我仔细查看了每个部分。
1) 表示从外部到内部的观察方式
2) 表示全面、彻底地了解某物
3) 常用于描述检查、研究或学习一个事物的全部方面
1. 从外到内；由外部进入内部。
e.g.The workers inspected the house outside and in.
工人们从外到内检查了这所房子。
2. 全面地；彻底地了解或查看某事物。
e.g.He knows the system outside and in.
他对这个系统了如指掌。
adverb phrase
1. From the exterior to the interior; completely and thoroughly.
Synonym: inside and out, thoroughly, completely