四维的

The two-parameter unfoldings of local dynamical behavior,near the point of Hopf-Hopf bifurcation, is investigated theoretically.

理论分析了四维范式映射在Hopf-Hopf余维二分岔点附近的参数开折。

Compared to surface time-lapse seismic, time-lapse 3-D VSP is short in acquisition time, cheap, and easy-to-processing, and it is superior in repeated reservoir characterization, determination of optimal well position, calculation of reservoir properties in certain areas, monitoring fluid flow, and reduction of risk in equipment investment.

时移三维VSP相对于地面四维地震来说，采集周期短、费用少、处理迅速、且可以重复用于油藏，应用于确定最佳井位，优化某特定区域的油藏特性，监测流体运动及减少新生产设备的投资风险。

It should be noted that here we only concern about the four dimensional case, neglecting other dimensional black holes.

需要说明的是本文只关心四维黑洞情形，不考虑其它维数的黑洞情形。

Space is considered to be three-dimensional and time is thought of as the fourth dimension.

空间被认为是三维的，而时间则被看作第四维。

4D seismic data is interpreted based on the diffence of time-lapse seismic data.

四维地震利用时延三维地震资料的差异来解释地下储层流体的变化。

Taking hyperchaotic Chen system and Rossler system as an example, the method is proved commendably effective and feasible.

以四维超混沌Chen系统和三维Rossler混沌系统为例，验证了这种控制器的有效性。

But now this area of exploration has been revolutionized with the development of 3-dimensional scans, and even more remarkably, 3D scans which move in real time, known as 4D scans.

但是随着三维技术的发展，甚至出现了更先进的实时三维技术或者称为四维技术，胎儿的研究有了全新的发展。

You must remember that in the process of becoming Fourth-dimensional Man, you have not left the other three dimensions behind.

你必须明白，在成为四维生命的过程中，你没有遗落三维中的一部分。

To paraphrase a statement you are familiar with You must see the Fourth-dimensional Reality right where the three-dimensional frame of reference sees itself.

解释一下你熟悉的那个状态：你必须在三维框架里看出四维实相来。

I was told in an intuitive reading, after Cloverleaf's inception, that four leaf clovers are considered lucky because they represent the Fourth Dimension, which is the place of instant manifestations, teleportation, telepathy and other enhanced abilities.

我被告诉用直觉阅读，在立体式开始之后，四叶草被认为很幸运，因为它们表现了第四维，它是即刻显现、心灵运输，心灵感应和其它增强的才能。

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。