你也要將肚臍洗乾淨，沒洗乾淨會黑黑的。
You should also clean your belly button thoroughly — if it's not clean, it will turn dark.
gloss逐詞
經過某處做某事（祈使）
go by there and do it! (imperative)
洗澡及洗身體其他部位
bathe and wash other parts of the body
語尾助詞
sentence-final particle
表結果；就
marking a result; so; then