如果确需改变用途的，应当征得捐赠人的同意。
Where such alteration is actually needed, he shall seek permission from the donor.
用途：能改变外形，适合从狭小的空间通过。
可以通过增加一个非必需的参数，轻松地改变这个函数的用途。
You can easily repurpose this function by adding a nonrequired argument.
使改变，将（某物）从一种用途、功能或目的转变成另一种；
To change (something) from one use, function, or purpose to another;
同时，这种负面影响会随着时间、考试地位和测试用途的改变而转变。
Meanwhile, the negative influence will vary along with the time, test position and test use.
同时，这种负面影响会随着时间、考试地位和测试用途的改变而转变。
Meanwhile, the negative influence will vary along with the time, test position and test use.
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