查询词典 difficult task

It is almost impossible for a ten-year-old boy to finish such a difficult task / so difficult a task.

一个10岁的男孩完成这么艰巨的任务几乎是不可能的。

This difficult task is the acid test for all of us.

这项困难的工作对于我们大家都是一种严格考验。

Admittedly , this is an extremely difficult task .

众所周知，这是一项极其困难的任务。

Even to an adult, it is a difficult task.

即使是成人，它也是一项艰巨的任务。

It is a difficult task to parallelize the existing sequential algor ithm.

对已有的串行算法进行并行化，是一项很困难的工作。

Identifying and challenging anticompetitive mergers is a difficult task that can take thousands of hours of investigative work and often, litigation.

鉴别和规制反竞争性的合并是一项十分艰巨的工作，它可能要花费大量的调查时间并经历多次的诉讼。

You may assign the difficult task to him because he is a man of ability.

你可以把这项艰巨任务交给他，因为他是个有才能的人。

However,the number of the LmPRM is very poor in the actual applications.The reasons of baffling their wide application have many aspects, hereinto includes:since the variety of mechanism type,difficult to select an optimal mechanism solution for a operation task;the performance indices depend on their topological limb types,the actuated layouts,and design parameters, such that their design is a difficult task.

然而实际在用的并联机器人机构的数目却非常少，阻碍其广泛应用的原因有很多，其中包括：机构类型的多样性，难以选择适合于操作任务的最佳机构方案；机构的性能指标依赖于其拓扑类型、驱动布局和设计参数，难以设计。

In this research, a system of various levels of task difficulty was set up by a complex rule. Three characteristics of implicit learning were detected with this system: 1 Implicit learning didn't work under the condition of the most difficult task. 2 When the task became easier, implicit learning started working on some level of task difficulty. 3 The efficiency of implicit learning would become higher if the task became easier; but there was a limit to the efficiency of implicit learning.

本研究利用自行设计的复杂规则产生出不同难度的任务系统，进而通过实验阐明了内隐学习的三个特征：在任务难度极大的情况下，内隐学习并不发挥作用；在任务难度降低到一定程度的时候，内隐学习开始发挥作用，这仿佛是一个"阈限"；随着任务难度逐渐降低，内隐学习的效率也随着提高，但是最终停止在一个较高的水平而不再继续上升。

In the case of polyphonic music signals, the estimation of the parameters of sinusoids is a difficult task, since the periodic components are usually not stable. A sufficient time and frequency resolution is also difficult to achieve at the same time.

因为周期分量通常不稳定，在多重的语音信号中，估计正弦模型的参数是一项十分困难的任务，同时也很难达到较高的时间和频率分辨率。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。