materially alter meaning in English

实质性变更

A purported acceptance dispatched by the offeree which materially alters the terms of the offer constitutes a new offer
受要约人对要约的内容作出实质性变更的，为新要约。
Fourth , my discussions with a wide array of business executives in an assortment of non - financial industries suggest that they have not materially altered their hiring plans , despite heightened concerns about general economic conditions
第四，我与非金融行业的大批企业执行者的讨论，显示他们不会明显改变其雇佣计划，尽管加强了对总体经济状况的关注。
2 however , a reply to an offer which purports to be an acceptance but contains additional or different terms which do not materially alter the terms of the offer constitutes an acceptance , unless the offeror , without undue delay , objects orally to the discrepancy or dispatches a notice to that effect
但是，对发价表示接受但载有添加或不同条件的答复，如所载的添加或不同条件在实质上并不变更该项发价的条件，除发价人在不过分迟延的期间内以口头或书面通知反对其间的差异外，仍构成接受。