This is the 11722nd most frequent Korean word.
낮아졌을
"낮아졌을" means "that has lowered" or "that has become lower."
Here, '낮아졌을' refers to a situation when the temperature has gone down, used as a condition.
기온이 낮아졌을 때 따뜻한 옷을 입어야 합니다.
When the temperature has decreased, you should wear warm clothes.
In this sentence, '낮아졌을' is highlighting a current or ongoing state where the machine's condition is lowered.
낮아졌을 상태에서 기계가 제대로 작동하지 않습니다.
The machine doesn't work properly when it is in a lowered state.
In this sentence, '낮아졌을' is used to describe a past event where the prices have decreased, in the form of a conjecture or probability.