Two examples? Reasons.
음? 당연히 나는건 날개를 사용하지 이사람아. 다리가 약해서 날기위해 날개를 사용하면... 다리가 강하면 다리로 납니까...큽 But their wings are weak as well. That's why they hang upside down. ( to gain enough speed and ideal postion for take-offs!)
뒤에 high location 언급 x

In the lecture, the professor gives two reasons of why bats hang upside down.

First, bats can hide from predators when bats hang upside down in dark places. They only move at night because predators move during the day. Therefore, the bats need to sleep and stay in dark places such as the roof of cave or underside of bridge during the day.

Second, bats cannot fly from the ground. But their wings are weak as well. That's why they hang upside down to gain enough speed and ideal position for take-offs. By sleeping upside down in a high location, bats are ready to drop and take off. This helps to escape from predators and find prey.