How the word "すいちゅう（水中）" is translated into English
この時計は水中でも使えます。
沖縄の海で、水中カメラを使って魚を撮りました。
長い時間水中にいると、耳が痛くなりませんか。
"すいちゅう（水中）" is in the lesson "Transportation" (Level 39), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.
