As indicated, most association reactions are reversible, and the A-M bond derives primarily from electrostatic forces whose energy (affinity) is typically 50 kcal/mol or less, often much less.
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much less often 不久经常
A real-world voltage source has a very low, but non-zero output impedance: often much less than 1 ohm.
一个真正的世界电压源具 有非常低的，但不为零输出阻抗：通常远小于1 欧姆。
The indoor relative humidity is now moderated so that it is always less than the variation outside, and often much less.
室内相对湿度变化总会比室外相对湿度变化小，有的变化小的很多。
Often much less expensive to rent and maintain than traditional office space (because of the flexibility), and closer to participants' homes, co-working Spaces are still in their infancy.
正是由于这种灵活性，这通常比租传统的办公室便宜很多，也离参与者的住所更近。
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