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Because recessive knowledge in recessiveness and intriguing influencing factor, although recessive knowledge exchange and sharing great importance, but is very actually difficult did not acknowledge that the recessive knowledge is very difficult to obtain it.

由于隐性知识的内隐性和错综复杂的影响因素，尽管隐性知识交流与共享极为重要，但却十分困难不承认隐性知识就很难得到它。

As the innovation of the paying land using system deepening, many academicians have studied intensively on the appraisal of urban benchmark land-value, however, because there is large otherness in all regions of cities, in the idiographic remise and attorn, it is very difficult for the benchmark land-value to guide and control the land price, the influence factors of the land price are complicated and are difficult to be appraised, so the research on the land price appraisal is very little.

随着土地有偿使用制度改革的深入，许多学者对城市基准地价评估工作进行了深入的研究，然而，由于城市内部各区域的差异性很大，在具体的出让、转让活动中，基准地价很难指导、控制宗地地价，而且宗地地价的影响因素复杂，评估困难，因此研究亦少。

Canines are considered one of the more difficult mammals to clone because of their reproductive cycle that includes difficult-to-predict ovulations.

犬类被视为较难复制的一种哺乳类动物，因为它们的繁殖周期中包含了难以预测的排卵过程。

What must really fall in love with a person is such easy, what but takes a group not resentfully really to love is good difficult good difficult.

要爱上一个人真的是那么的容易，但是要一路无怨的爱下来真的是好难好难。

It is difficult to exercise self-control, that is , difficult to keep within limits.

自己很难控制，即很难控制在一定的范围之内。

In Japonica heterosis utilization, the purity of hybrid seeds was sometimes low due to the self-fertility and/or unstable sterility of some BT type Japonica cytoplasmic male sterile lines. For the WA type Japonica CMS lines, their sterility is much stable, but there is also some difficult to take use of them because their flowering habit is bad and it is very difficult to restore their fertility. The HL type CMS lines were identified to have the same flowering habit and outcrossing rate with the BT type CMS lines in Japonica hybrid rice. Moreover, the sterility of HL type CMS lines was more stable than that of BT type, and their restorable characteristics was better than that of WA type.

部分BT型粳稻不育系存在自交结实现象，不育性的稳定性较差，影响杂交种的纯度；WA型粳稻不育系虽然不育性稳定，但开花习性差，育性最难恢复，应用难度较大；HL粳稻不育系开花习性及异交结实率与BT型粳稻不育系无显著差异，育性稳定性明显好于BT型粳稻不育系，可恢复性明显好于WA型粳稻不育系，较好地协调了育性稳定性、开花习性和可恢复性几方面的矛盾。

They will tell you that this past year has been the most difficult level of transcendence that they have faced in their entire ascension, and that self-mastery is perhaps the single most difficult path that any initiate can take.

他们将告诉你去年他们在完全提升中面临了最困难的改变水平，自我掌握或许是任何提升者采取的一条最困难的路。

China is one of world agricultural product great nations, the very difficult name on is actually an agricultural powerful nation, China's agricultural product trade very is actually difficult and other developed large agricultural nation setoff.

中国是世界农产品大国之一，却很难称得上是一个农业强国，中国的农产品贸易却很难与其他发达的农业大国媲美。

Over the past three years the company has invested substantial funds and scientific talent, committed to an intelligent lighting system, which lasted three years, capturing the smart switch "single access point the fire difficult, does not apply to energy-saving lamps, fluorescent lamps, switches itself Zhigong consumption, and higher temperature rise of a series of difficult questions and break the "energy-saving lamps can not single-fire switch dimming myth.

近三年来公司又投入了大量的资金和科研人才，致力于照明智能化的系统研究，历时三年，攻克了智能开关"单火取点难，不适用于节能灯、日光灯，开关本身功耗大、温升高等一系列老大难问题，打破了"节能灯单火开关根本不能调光的神话。

Paper folding is easy, it is difficult to fold DNA, fold DNA into the figure of copy China domain that has line of sinuate border land, more extremely difficult.

折纸轻易，折 DNA 难，把 DNA 折成拥有弯弯曲曲边境线的仿中国版图外形，更是难上加难。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。