Create an instance of this class up front so it is ready when you need it without needing to consume memory.
预先创建此类的一个实例，以便随时使用，而无需占用内存。
All you would have to do is to be sure to keep the bookpoolHelper class up to date as you add more test case scripts and cover more application functionality.
所有您必须做的就是，在您增加更多的测试脚本和覆盖更多的程序功能时，确保更新bookpoolhelper类。
Everything we've done with the new class up to this point should work just fine as long as any HistoryStack objects are still resident in the current document.
到目前为止，只要HistoryStack对象存在于当前文档中，这个新建的类就能正常工作。
应该让这个班活跃起来。
The wind blew her beautiful dress up in front of the whole graduate class! She didn't know whether to cry or laugh.
风把她那件漂亮的裙子在了整个研究生班的面前吹了起来！她不知道该哭还是该笑。
Time is up. Class is over. That's all for today.
时间到了，下课了，今天就学到这儿。
India's normally tame middle class is speaking up against social ills.
印度通常温驯的中产阶级正在大声疾呼，反对社会弊病。
One day after class, a student came up to me and recommended traditional Chinese medicine.
有一天课后，一个学生找到我，并向我推荐了传统中医。
It is up to the monitor to manage the affairs of our class when the teacher goes out to attend meetings.
当老师出去开会的时候，管理班级事务就成了班长的职责。
The class got up when the teacher came in.
老师进来时全班起立。
On Thursday night she went to her yoga class, glad to have something to fill up the evening.
星期四晚上她去上了瑜珈课，很高兴有事可做来打发晚上的时间。
I would sooner give up sleep than miss my evening class.
我宁愿不睡觉也不愿错过晚间课程。
The cost of third-class mail has gone up by 50 per cent.
第三类邮件的邮资上涨了50%。
The airline apologized and bumped us up to first class.
航空公司道歉后把我们掉换到头等舱。
As of February 3rd, the price of a first class stamp will go up to 29 cents.
自2月3日起，每张一等邮票的价格将上涨到29分。
I was up till 3 this morning, writing a paper for my literature class.
我熬夜到今天早上3点，写文学课的论文。
Some parents would arrange for some home tutoring to get their children up to speed with the other kids in class.
有些家长给孩子们安排了一些家庭辅导，以帮助他们跟上班里其他孩子的进度。
One day in class, the teacher held up an apple.
一天在课堂上，老师举起一个苹果。
I'm really glad to see you all here. It is indeed commendable that you got up so early in class.
我真的很高兴在这见到大家。你们起这么早来上课的确值得表扬。
They need extra help to catch up in the math class.
他们需要额外的帮助才能在数学课上赶上进度。
Just turn up for the first class.
来上第一节课就行了。
Dad picked me up to drive me to karate class.
爸爸开车接我去上空手道的课。
Girls are more likely to speak up frequently and make significant contributions to class.
女生更有可能经常发言，并对班级做出重大贡献。
His status in Lord Wellington's headquarters and the recognition given to him for his work were all bound up with the class politics of the army at the time.
他在威灵顿勋爵总部的地位，以及他工作受到的认可都与当时军队中的阶级政治紧密相关。
Staying up late to play computer games may leave you nodding off in class.
熬夜玩电脑游戏可能会让你在课堂上打瞌睡。
What language class did you sign up for?
你报名参加什么语言课程？
Some hours after the two-part session, there is a follow-up class at which the students are stimulated to recall the material presented.
这个由两部分组成的课程结束后的几个小时，会有一节后续课程激励学生们回忆所呈现的材料。
"I still grew up in an upper middle-class home with parents who didn't have college degrees," Schneider said.
施耐德说道：“我的父母没有大学文凭，但我仍然成长于一个上层中产阶级的家庭。”
She brought us up to the front of the class and placed him on one side of her desk and me on the other.
她把我们带到教室前面，把他安置她桌子的一边，我在另一边。
In fact, usually the system blocks anyone trying to sign up for a class they shouldn't be taking, who hasn't taken the courses you are required to do first as prerequisites.
事实上，这个系统通常会阻止任何想要注册他们不应该选的课程的人，也就是那些没有选必选先修课程的学生。
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