一,if I were you,Id let her cool off a few days before I approach her.
Well此处起到语气词的作用，相当于嗯，呃，暗示语气有轻微转折。Id是I would的省略形式，意为我会。其中的would主要是强调主观的.意愿，而非对时态进行暗示。
cool off此处意为冷静下来，镇静下来，该短语还含有使某人感到凉快;冷却之意。如
Drink some cold water to cool yourself off.
喝点凉水，凉快凉快。
before本意是在以前，此处是指先再。approach此处意为接近。
英语六级考点归纳：
在口语中与cool相关的短语还有：
cool down意为使冷静;渐渐冷却。如:
Housing market continues to cool down.
房地产市场继续降温。
keep cool意为保持凉爽;保持冷静，保持沉着。如:
You should keep your cool in the heat of competition.
在激烈的竞争中，你应该保持沉着冷静。
lose ones cool意为无法自制，失态。如:
By the end of the game, the coach had Iost his cool。
比赛结束时，教练失态了。
as cool as a cucumber意为非常冷静，泰然自若。如:
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