By reading the Watchtower magazine every month I kill two birds with one stone. I expand my knowledge about the creatures on Earth, and I also learn about the Bible.
kill two birds with one stone這是正統的美語說法.
老師 (讓小朋友出校車後): 別嬉戲，別跟陌生人說話。 (請填空)
Teacher (after letting kids out of the school bus on a field trip): No orseplay. Don't talk to strangers.