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いつの間にか， 何時の間にか， いつのまにか
1. before one knows, before one becomes aware of, unnoticed, unawares
不知不觉间，在察觉之前，悄然无声，浑然不觉
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暗い， 昏い， 冥い， 闇い， くらい
1. dark, gloomy, murky
2. depressed, dispirited, down in the dumps, dark (mood)
3. dark (in colour), dull
4. ill-boding, dark (e.g. past), suspicious
5. unlikely (to succeed), hopeless, unpromising
6. unfamiliar (with), ignorant (of)
暗的，黑暗的
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なる， 成る， 為る
1. to become, to get, to grow, to turn, to reach, to attain
2. to result in, to turn out, to end up, to prove (to be)
3. to consist of, to be composed of, to be made up of
4. to be completed, to be realized, to succeed, to be attained, to be accompli...
成为，达到，取得；变成