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The schema of mathematics concept is a whole of mental representation which people builds up.

每一个数学概念的认知结构就是主体对它所建立的心理表征的综合体.

Why is basing your object model on an existing data schema a bad idea?

为什么以已有的数据模式作为对象模型的基础不是一个好主意?

It's natural to slack off towards the end of a hard day's work.

辛苦工作了一天,快结束时有所松懈是很自然的.

She was staring into space, her mouth slack.

她双唇微张，失神地望着前方。

Ask them to be more careful. Don't let them get slack.

你要他们仔细点, 不要马马虎虎.

Slack up the tent ropes before it rains.

在下雨之前把帐篷的绳子放松.

Some are hard at work and some are slack in work.

有的勤奋工作,有的则消极怠工.

He pulled in the slack of the rope.

他收紧松垂的绳索.

The rope is too slack.

绳子太松了.

Living alone, he became slack about his appearance.

由于单独过活, 他对自己的外表越来越不在意了.

Please slack up your speed. I can't run as fast as you!

请你跑慢点! 我跑得没你快.

He is always slack in doing his homework.

他做作业总是马马虎虎.

He tightened a few slack screws.

他把几个松动的螺钉拧紧了.

Don't get slack at your work.

不要对你的工作懈怠.

Don't slack off in your studies.

学习上不可懈怠.

Don't slack up your effort , as we are getting to the end.

快到完成的时候了,别松劲啊.

Slack off those ropes there ; there's a storm coming!

把那里的绳索放松, 暴风雨就要来了!

Those who are slack in their work will never have a chance to be successful.

干活马虎的人永远都不会成功.

Discipline in Mr. Brown's class becomes very slack.

在布朗先生的班上纪律很松.

Slack the rope before trying to untie the knot.

解结之前先将绳索放松.