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moreover; furthermore
nevertheless; and yet
彼は優秀で、しかも性格も良いので人気がある。
He is excellent and also has a good personality, so he's popular.
この店は安い、しかも美味しいので通っている。
This store is cheap and also delicious, so I frequent it.
彼女は歌が上手でしかも踊りも得意だ。
She is good at singing and also skilled at dancing.