Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
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Vocabulary
Non-JLPT
Day 166
乳酸
New
乳酸
乳酸
にゅうさん
lactic acid
noun
Sino-Japanese
Lv.6
Again
1
Hard
2
Good
3
Easy
4
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