门阶

After a direct limit raise to three of opener's major: the cheapest bid asks for shortness.

直接有限支持到开叫高花的三阶之后：最便宜叫品为询问短门。1 -3 -3NT为对的示控叫品。

A clinical investigation on providing enteral nutrition in earlier period for patients after underwent epigastrium surgery

计学，由于受到苏联1954年统计科学会议的影响，即把统计学定义为一门具有阶

Generally,the best efficiency is obtained in second order vibration mode of the fishtail,and the reverse Karman Vortex Street wake is observed with corresponding frequency.

在一般情况下当外磁场以系统的二阶固有频率工作时其工作效率最佳。在此情况下鱼尾摆动产生了推力型反卡门涡街形态的尾迹涡流。

A direct two-notrump overcall of a suit one-bid shows either a weakish or a very strong hand with length in the two lowest unbid suits.

对一阶花色开叫直接插叫2NT为弱牌或非常强的牌，且持有两门较低的未叫花色。

Negative doubles : A negative double at the one level or when there is exactly one unbid major guarantees at least four cards in any unbid major (opener may rebid in a three-card suit there in a pinch); otherwise, that requirement is only tentative (opener should not rebid in a three-card suit).

否定性加倍：否定性加倍在一阶或当正确地有一门未叫高花即为保证任何未叫高花至少有4张以上(开叫者可能在不得已情况下叫出3张高花)；否则，这只是一种假设性的要求(开叫者不应叫出3张的高花)。

His work opened a new way of dealing with subatomic particles known as quantum mechanics or wave mechanics.

并创造了量子力学这门新兴的物理学。它是一个复杂的二阶偏微分方程，其形式为

At present, the city wall and the foundation and the stone columns and cloud and jade stairs of Luck Receiving Gate, Luck Receiving Palace are well-preserved.

现在王城城墙及承运门、承运殿的台基、石栏和云阶玉陛保存较为完好。

This paper presents a practical second-order method of the stability of main frame of the steel arch gate by combining the virtues of calculating length method.

本论文的重点为提出框架柱计算长度系数μ实用计算公式，及考虑剪力影响、不对称性等因素对μ影响的研究；提出弧门主框架弹塑性稳定计算方法；提出弧门主框架弹塑性稳定二阶分析实用计算方法。

An algorithm of path-based timing optimization by buffer insertion is presented.The algorithm adopts a high order model to estimate interconnect delay and a nonlinear delay model based on look-up table for gate delay estimation.

提出了一种基于路径的缓冲器插入时延优化算法，算法采用高阶模型估计连线时延，用基于查表的非线性时延模型估计门延迟。

I used the homemade ECDL to measure the 2S-3D two photon transition spectrum of Helium , the advantages are that the expense of homemade ECDL is cheap and have good output power. At the same time, I used the electronic part can be got in the market to manufacture a pulse generator in the experiment, the pulse generator can control the output frequency, the pulse width, the relative phase and also can simultaneously control four sets of systems or instruments need the TTL pulse control. The advantage is that the cost of the pulse generator is cheap and the pulse generator is stable. To isolate the magnetic field I used the magnetic foil to helium cell. I also built a gas discharge system, the switch sequence of this system can be controlled by the pulse generator. Finally I built a detecting system can measure the helium energy state. It is cheap and can be combined with the comb laser system in my laboratory.

本实验是利用一台自制的外腔雷射系统来量测2S-3D的氦原子双光子跃迁，其优点在於自制的外腔雷射之费用非常便宜，也有不错的输出功率，同时在实验中我利用市售的电子零件制作了一台脉冲产生器，可控制输出的频率、脉冲宽度以及相对的相位，且可同时控制四套需要TTL脉冲控制的系统或仪器，优点除了便宜之外，也非常稳定；为了隔绝磁场，利用了磁场隔绝金属箔，我也在实验室中建立了一组气体放电系统，其系统可以用脉冲产生器来控制开关时序，最后，我建造了一个氦原子能阶的量测系统，而且费用低廉，可与本实验室的另外一门研究光梳雷射系统做结合。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷