英语 PCN
Speaker 1: Juliana Lee Speaker 2: Dr Kwan Emcee: Olive Koo Immunity is the best line of defence against the invasion of bacteria and viruses. It defends our body like …
Speaker 1: Juliana Lee Speaker 2: Dr Kwan Emcee: Olive Koo Immunity is the best line of defence against the invasion of bacteria and viruses. It defends our body like …