一方面,他们可以保持水的清洁。 For one thing they keep the water clean.
一方面你接受他的礼物,另一方面你对他们一家人粗暴无礼,你对他们究竟抱什么态度? On the one hand you accept his presents; on the other hand, you are rude to the whole family. What really is your attitude to them?
一方面我是你的经理,另一方面,我也是你的朋友。 On the one hand, I am your manager, and on the other, I am also your friend.
一方面你不应当拘束,另一方面也不要放肆无礼。 On the one hand, you shouldn't be shy; on the other hand, you mustn't forget your manners.
一方面我是你的老师,另一方面,我也是你的朋友。 On one hand, I am your teacher, and on the other, I am also your friend.