- A+
It may 
be said that the measure of the worth of any social institution is its effect in enlarging and improving experience; but this effect is not a 
part of its original motive.
句子分析
1.本句为but连接的并列句。
2.前句主干为：it may be said that +主语从句；其中it为形式主语，that引导的从句为真正的主语。该从句的主干为：the measure… is its effect…; 其中of the worth of any social institution 修饰the measure; in enlarging and improving experience修饰its effect。
3. 第二个分句为主系表结构：this effect is not part …; 其中介词短语of its original motive 修饰part.
词的处理
it may be said that … 或许可以说、我们可以说
measure n. (衡量、估价的)标准、尺度
worth n. 价值
social institution 社会机构
enlarging and improving experience 直译为：扩大和改进经验，也可意译为：丰富和完善人生经验
original adj. 最初的
motive n. 动机
参考译文
It may be said that the measure of the worth of any social institution is its effect in enlarging and improving experience; but this effect is not a part of 
its original motive.
虽然我们可以说衡量任何社会机构价值的标准是其在丰富和完善人生经验方面所起的作用，但这种作用并非其最初动机的一个部分。
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