How the word "いちど（一度）" is translated into English
一度日本に行ってみたいです。
週に一度、プールで泳ぎます。
すみません、もう一度言ってください。
"いちど（一度）" is in the lesson "Time 3" (Level 40), along with 13 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.
