N2
上は
Once, Since, Now that, As long as
表面
上
は
平穏
な
日々
が
続い
て
い
た
。
On the surface, peaceful days continued.
実用
上
は
どちら
を
選ん
で
も
問題
は
ない
と
思い
ます
。
I think there’s no problem whichever one you choose in practical use.
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