Your paper marks a forward step in the research.

It marks a forward step in human progress.

这标志着人类发展的一次进步.

We must step in any matter that does not agree with principle.

我们必须干涉任何不符合原则的事情.

For once the step-mother had nothing to say.

这一次 继母 没话说了.

Tom's step-mother allowed him to eat so much in a day.

汤姆的 继母 一天内只允许他吃这么多.

I do not seem to be able to please my step-mother and Isable; more .

看来我没办法使 继母 和 伊莎贝尔 满意.

My step-mother always gives her son an advantage over me.

我的 继母 总是使他的儿子比我占优势.

Go to your step-mother and ask her to give you provisions for the journey.

去找你 继母,让她给你准备些东西路上吃.

I do not seem to be able to please my step-mother and Isabel ; more.

看来我没办法使 继母 和 伊莎贝尔 更满意.

She is afraid of her cruel step mother.

她害怕狠心的继母.

All would have been well with her but that she had a cruel step-mother .

要不是因为她有个狠心的 继母,她的一切本来都会挺好的.

Amy's pitiless step-mother refused to look after her when she was seriously ill.

艾米那个铁石心肠的 继母 在她生重病时不肯照料她.

The step-mother gave the boy the stick without any reason.

继母 无缘无故地打了那男孩一顿.

Such were the words of the step-mother .

这是 继母 的话.

We must step up our vigilance.

我们一定要提高警惕.

We should step up the development of infrastructure for research.

加强科学基础设施建设.

The teacher called Dabao to step up the platform.

老师叫大宝走上讲台.

As new orders keep pouring in, the workers are working three shifts to step up production.

因新的订单源源而来, 工人们正三班工作加速生产.

Chavez wants to take a step up in competition.

小查韦兹想提高今后比赛的挑战性.

I step up the breathing rate -- timing the contraction and relaxation of chest muscles.

我增加呼吸率 -- 调节胸部肌肉的收缩和舒张的速率.

You have to step up your pace.

你得加快步伐.