请好心人帮我看看下面英文合同的一段话到底什么意思啊,

请好心人帮我看看下面英文合同的一段话到底什么意思啊,
b) Mandatory Sale.Upon receipt of a written offer from the Offeror,the Offeree,shall have sixty (60) days to elect in writing whether to buy all but not less than all of the offered Stock of the Offeror at the price per share specified by the Offeror pursuant to the terms of paragraph 2(a) above.If the Offeree so elects to acquire all of the Stock offered by the Offeror,the Offeree shall have one hundred eighty (180) days after the date of such election to purchase the Stock offered by the Offeror.
In the event the Offeree either elects in writing to the Offeror not to acquire his/their proportionate share of the offered Stock or fails to deliver Offeror written notice within sixty (60) days of the Offeree’s receipt of the offer written notice of election to purchase his/their proportionate share of the offered Stock,the Offeree shall be deemed to have elected to sell all of his/their Stock to the Offeror and the Offeror shall be obligated to purchase such Stock (or,if the Offeror’s original offer was to sell a percentage of his Stock less than 100%,the Offeree shall be deemed to have elected to sell the same percentage of his/their Stock to the Offeror and the Offeror shall be obligated to purchase such Stock).