conscientiously behave oneself play no tricks act honestly and sincerely in earnest
conscientiously 英 [ˌkɒnʃiˈenʃəsli] 美 [ˌkɑːnʃiˈenʃəsli]
behave oneself 英 [bɪˈheɪv wʌnˈself]
play no tricks
act honestly and sincerely
in earnest
老老少少用英文怎么说
老耄用英文怎么说
老者用英文怎么说
老而弥坚用英文怎么说
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