It is interesting that no one noticed that mistake.
だれもその間違いに気づかなかったとはおもしろい
It is interesting to see ...
…を見るのはおもしろい
It is invisible to the naked eye.
それは裸眼では見えない
It is irrational to believe in magic.
魔術を信じるなんてばかげている
It is just 10 o'clock.
いまちょうど１０時です
It is just on six.
ちょうど６時です
It is kind of you to do ....
…してくださってありがとう
It is legitimate to ....
…するのも当然だ
It is little less than bribery.
収賄同然だ
It is mandatory to wear a seat belt.
シートベルトの着用は義務である
