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May disiliplina sa kanilang sarili
like what ? Obeying their rules in their country , strictly not allowed to trash anywhere , If you against in their rules you are possibly in jail or It can give you a case into jail , So Singaporeans are afraid to against in their country rules.
Pagkamasunurin at may disiliplina sa sarili :-)
sana makatulong sagot ko XD hehehe