字典中对 “Proviso” 的释义为：

the chance to change a decision or an agreement if a situation changes

在法律英语中， “Proviso” 常用来表示：“限制条款”；“附文”；“但书”等意。

【双语实例】

Tenant shall not be required to join in any proceedings referred to in the proviso at the end of 4.6 hereof unless the provisions of any law, rule or regulation at the time in effect shall require that such proceedings be brought by or in the name of Tenant, in which event Tenant shall join and cooperate in such proceedings or permit the same to be brought in its name, but shall not be liable for the payment of any costs or expenses in connection with any such proceedings, and Landlord shall reimburse Tenant for, and indemnify and hold Tenant harmless from and against, any and all costs or expenses which Tenant may reasonably pay, sustain or incur in connection with any such proceedings.

承租人不得被应要求参加本合同第四条第六款最后但书/限制性条款提及的任何诉讼， 除非当时生效的法律法规要求该诉讼应以由承租人或以承租人名义提起，此种情况下，承租人应参加配合该诉讼或允许该诉讼以其名义提起，但概不承担任何与该诉讼有关的任何费用和花费，业主应偿还并保证赔偿承租人合理支付的因该诉讼产生或遭受的全部费用和花费且确保承租人免于以上责任。

It was recalled that the Commission specifically considered this point during the first reading and decided to not include such an additional proviso. 

委员会在一读期间特别考虑了这一点，并决定不加上这一 额 外 的但书。 

The Conversion Shares shall, save as provided for in these provisions, rank pari passu in all respects with the Ordinary Shares in issue at the time the Conversion Shares are issued, and shall, subject to the proviso of paragraph 5(C) in this Bye-law 6(C) and this paragraph [...] 7, entitle the holders thereof to all distributions paid or made on the Ordinary Shares by reference to a Record Date falling after the Conversion Date, provided that if a Record Date after the Conversion Date is in respect of any distribution in respect of any financial period of the Company ended prior to such Conversion Date, the holders of the Conversion Shares will not be entitled to such distribution. 

除该等条文所规定者外，兑换股份在各方面与发行兑换股份时已发行的普通股享有同等地位，并在本公司细则第 6(C)条第 5(C)段及本 第 7 段条文的规限下，赋予 兑换股份持有人权利获得于兑换日期后 记录日期普通股所获派付或作出的一切分派，惟倘于兑换日期后记 录日期就本公司截至该兑换日期前止任何财务期间作出任何分派，则兑换股份持有人将无权获得有关分派。