◆to tread a delicate line or to tread a delicate path or to tread a fine line or to tread a fine path
(between opposing demands)走钢丝般行事；小心地把握分寸
The President will therefore have to tread a very fine line when he addresses the parliament.这样一来, 总统在向议会演讲时将不得不仔细拿捏分寸。