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To understand the orgin of the Black Labrador Retriever, it almost requires a study of the history of Newfoundland.

要了解黑拉拉的起源，这几乎需要了解整个纽芬兰的历史。

When the signal sources have different cycle frequencies, a method to estimate the optimal time lag is presented. It solves the severe problem that the conventional Cyclic MUSIC requires knowing the optimal time lag in computing the cyclic correlation matrix. A method of two-step search for DOA estimation by employing an interleaving technique and a Joint Estimation Strategy is developed to overcome the inadequency of signal sources with the same cycle frequency having no optimal time lag.

当信源的循环频率各不相同时，提出了一种估计最佳延时的方法，解决了传统Cyclic MUSIC算法计算循环相关矩阵需要已知最佳延时的问题；为克服多个具有相同循环频率信源不存在最佳延时的不足，利用交错技术和联合估计策略，提出了两步搜索估计DOA的方法。

It is well-known that reduced Hessian method is one of the most efficient methods for solving large scale constrained optimization problems. However, the convergence analysis for the method requires of the positive definiteness of the reduced Hessian of Lagrangian function.

众所周知，既约Hessian方法是求解较大规模约束优化问题的一类有效方法，但已有的这类方法的全局收敛性分析需假定拉格朗日函数的既约Hessian矩阵的一致正定性。

But Lamarckian evolution requires an organism to have a working index to its genes.

不过，拉马克进化需要生物给它的基因下工作指标。

If nature transmitted information in both directions within organisms , it would allow the possibility of Lamarckian evolution, which requires two-way communication between gene and its products.

如果大自然在生物体中是双向传递信息的，就会产生拉马克进化的可能，它需要在基因和其产物之间双向交流。

Biological Lamarckism probably hasn't happened because it requires an improbable biological decryption scheme.

生物学的拉马克学说之所以没有奏效，可能是因为它需要一种不大可能存在的生物解码方案。

Aircraft carrier-based fighter, not even with the slide jump the catapult off the front wheel traction mode, the aircraft landing stage in the block are inevitably linked with a bow after the process, the front landing gear before the grounding process necessarily requires the structure to withstand large the impact of such a large impact load without a decentralized structure with high strength and conductivity is unbearable.

航母舰载战斗机即使采用滑跃而不是前轮牵引的弹射起飞方式，飞机在拦阻着陆阶段挂钩后都必然会有个低头的过程，前轮接地过程中前起落架必然需要在结构上承受很大的冲击，这么大的冲击载荷如果没有一个高强度的结构进行分散和传导是难以承受的。

Verrucous carcinoma of the larynx is a special pattern of the hyper-differentiated squamous cancer. A correct diagnosis requires close cooperation between the laryngologist and the histopathologist.

喉疣状癌是高分化鳞状细胞癌的一种特殊类型，本病角诊有赖于病理专家与喉科医师密切配合。

As with online and laser disk databases, each system requires different access protocols, and many e-mail system require some financial outlay as well.

作为线上和光碟资料库，每个系统需要不同的检索协定，以及许多电子信箱系统需要进行一些财务开支等等。

Weed control requires treatments specific to the type of weeds you may encounter; broadleaf weeds like Dandelion, for example, are best treated in the late fall.

杂草控制需要处理特定于您可能遇到的杂草种类；像蒲公英阔叶杂草，例如，最好在晚秋处理。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。