nocturnality
/ˌnɒktɜːˈnælətɪ/ 10Nocturnality is a behavior in some non-human animals characterized by being active during the night and sleeping during the day.
noun [具体名词]夜间活动性；夜间活动的习惯
Other ways an organism may be cryptic include nocturnality, subterranean lifestyle, and transparency.
生物具有的其他隐蔽能力包括夜间活动、地下活动以及透明物态。
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