作为另外一种预防杂草的防护措施，你可以一直使用一层厚重耐磨的聚乙烯底垫。

As an additional safeguard against weeds you can always use an underlay of heavy duty polyethylene.

《柯林斯英汉双解大词典》

该校自1883年以来一直在不断使用中。

The school has been in continual use since 1883.

《柯林斯英汉双解大词典》

两年来，两套系统我们一直同时使用，互不矛盾。

We have been using both systems, side by side, for two years.

《牛津词典》

So all of these programs or commands that we've been using thus far for the piece set in class, take what we call command line arguments, they are the zero or more words that follow the program's name.

所有我们一直在课堂上使用的,这些程序或者命令，携带着命令行参数，它们是跟在,程序名的后面的一个或多个单词。

哈佛公开课 - 计算机科学课程节选

Up until then they had been using the old stadium, which now has been turned into a park.

在那之前，他们一直使用旧体育馆；现在旧体育馆已经成为一个公园了。

布朗克斯的景点 - SpeakingMax英语口语达人

Well a number of you have spent this past week playing with this particular tool which is a project the course has been working on for some time in an effort to make it easier and more social to actually shop for courses.

在过去的一周里,已经有一部分人开始使用这种特殊的工具了,这门课程一直在致力于这一工具的开发,目的是为了让课程变的更简单,选课更人性化。

哈佛公开课 - 计算机科学课程节选