Using host names is helpful for users, because they don't need to memorize difficult IP addresses.

使用主机名对于用户来说很有帮助，因为他们不需要记住不同的IP地址。

youdao

For example, in a calculus course it's not terribly difficult to memorize the formula for integration by parts for integrals.

例如，在微积分课程中，记下分步积分法的公式并不是特别难。

youdao

It is difficult for them to memorize the knowledge they listen to someone talk about it.

除非他们听别人谈论这些知识，不然他们就很难记住这些知识。

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"It is not the length of the price in digits that determines how difficult it is to memorize, but rather how many syllables this price has when read, " explains the research by Professor Calder and academics at two other institutions.

CNN: Researching the business world