Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
App Store
Google Play
Vocabulary
N1
Day 44
於いて
New
於いて
於いて
おいて
at ~, in ~, in terms of ~
expression
set phrase
Lv.5
Again
1
Hard
2
Good
3
Easy
4
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