求翻译：发盘中通常有明确的有效期（或是一个最迟接受的期限，或是一段接受的时间），并在送达受盘人时生效，因此，发盘在到达受盘人之前对发盘人没有约束力，发盘人也可以将其撤回。可见，撤回发盘实质上是阻止发盘生效。是什么意思？

Hair plate usually has a clear period (or a period later than acceptable, or acceptable period of time), and becomes effective when served by the plate, so the offer reaches the offeror in the offer before the people not binding, an offer people can be withdrawn. Visible, to prevent withdrawal of th

In the disk is usually a clear validity (or is one of the most late acceptance, or the period is a period of time) accepted, and served in the liquidator shall take effect at the ROM, therefore, before arriving in the liquidator of the liquidator is not legally binding, the liquidator may also be wi

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Validity of the offers usually have a clear (or an acceptable period at the latest, or a acceptable time), and served on the person to take effect, so the offer reaches the offeror before an offeree is not binding, offeror can withdraw it. Visible, withdraw offer essentially block offers to take eff

Usually have clear validity (or a time limit accepting in the offer at the latest, or time when a segment accepts), and come into force while sending to plate people, so, offer have engagement to offer people before reaching plate people, offer can recall it too. It is obvious, it is actually to pre