Of course, sometimes it's hard to automate things, but you should at least consider the option and weigh its advantages against the time you will spend automating it.
当然，有时很难自动化，但应该至少考虑这个问题，并且权衡其优势及自动化所花费的时间。
Its other great virtue, of course, is its hard-wearing quality.
它的另一个突出优点当然就是经久耐用。
The course of software engineering is quite theoretical and hard for students to understand its principles in class, if they have no actual development practice.
软件工程是一门理论性很强的课程，没有开发实践经验的学生在听课时会感觉非常抽象，难以理解。
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