块

A rounded mass of mineral matter found in sedimentary rock.

成团的；结块的；聚结的聚集成圆形团块的

Based on the Seidel sums formulae of thin lens, four types of NIM thin lenses free from partial primary aberrations are designed with specific parameters and given redundant aberration coefficients.

通过对单块负折射率介质薄透镜的像差特性分析，我们提出了四种只有利用到负折射率介质才具备的可消除部分初级像差的单块薄透镜系统，并给出了相关的系统结构参数和冗余的初级像差表达式。

Undoing a block does not require an expensive sequential scan of a log file. It is simply a matter of locating the right version of the data block within the database.

还原数据块时无需执行代价高昂的日志文件顺序扫描操作，而只需在数据库内确定数据块的正确版本即可。

A divided B-spline surface model of shoe tree is founded, which offered the sound tree model for the shoemaking CAD/CAM. The calculating equation for control points of the bottom of the shoe tree is established for first time. A new method called LID to construct lateral and front surfaces of the shoe hell is proposed which furnishes the possibility for the hell CAD.

本文建立的楦体分块B样条曲面模型，为制鞋CAD/CAM提供了良好的楦体模型；首次建立并给出了楦底控制点计算方程和楦底分块Bezier曲面模型，奠定了鞋跟鞋底造型的基础；文中提出的设计鞋跟跟口面和跟侧面的LID方法，为鞋跟造型提供了实现可能性。

In order to overcome some difficulties in mechanized kaolin mining, such as the weak roof, hard ore body, high toughness, it is necessary to apply long hole standing shot technology before the mining activity so as to improve the mechanical cutting efficiency and meet the demand of blocks degree.

为了解决煤系高岭土矿机械化开采存在顶板软弱，矿体相对煤炭质地硬，韧性大，矿石块度要求适中等难题，有必要在开采前采用预先对矿体进行充分合理的松动爆破，以提高机械切割效率及满足矿石块度适中的要求。

In programmed freezing method, HESCs were divided into many clumps by sipper after digestion and 65 clumps of freezing liquid were put into tubules. Cooling procedures consisted of three steps: from 22 ℃ to –7 ℃, 2.5 ℃/min; from –7 ℃ to –30 ℃, 0.3 ℃/min; from -30℃ to –150 ℃, 10℃/min.

程序降温法：用吸管将消化后人胚胎干细胞吹成若干团块，取65个团块移入配制的冻存液中，装入麦管进行三段式降温，即22 ℃~-7 ℃，每分钟降温2.5 ℃→-7 ℃置核后停留5 min→-7 ℃~-30 ℃，每分钟降温0.3 ℃→-30 ℃~-150 ℃，每分钟降温10 ℃。

In the solution of the Difichlet boundary problem ofLaplace equations, we provide an effective method for determining the spectral radiusand the best slack variable of block basic iterative methods. At the same time, wepresent the spectral radius and the best slack variable of basic iterative methods from thenine-point difference scheme.

在解决Laplace方程Dirichlet边值问题上，文章为确定块基本迭代方法的谱半径和SOR方法最优松弛因子提供了一个有效的方法，并推导了九点差分格式下的块基本迭代方法的谱半径和SOR方法最优松弛因子。

Hermione filled two chocolate cakes with Sleeping Draught, and Harry and Ron used them to knock out Crabbe and Goyle CS12

赫敏在两块巧克力蛋糕里放了催眠药，哈利和罗恩用这两块蛋糕迷倒了克拉布和高尔

A new formula is established which provided a simple and practical theoretical method for deriving speed at different points of the slide bar mechanism.

利用三心定理、几何和极限理论首次证明导杆机构的滑块绕机架与滑块的绝对瞬心的角速度等于导杆转动的角速度，并建立了新公式。

The upper volume lies over it, by abstraction it differs from the stone socle and the terrain.

上部体块部分悬挑在下部体块之外，抽象处理后的形态，与石基和地形形成鲜明对比。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。