球的专业术语。针对斯诺克球的满杆了解如下。
每年此时，英国栖满松鸡的沼泽地都会遭到“斜纹呢子军”的围剿，每杆枪的主人都希望能在开猎的第一天装上一两只松鸡回去。
Each year the country's grouse moors are invaded by a tweed-clad army of “guns” intent on bagging a brace or two of birds on the opening day of the shooting season.
采用的力学准则为满应变设计准则； 在整个桁架结构重量满足一定约束的前提下，通过优化各杆件截面积，达到整体柔度最小。
Under the premise of the weight of the entire truss structure satisfying certain constraints, it achieved the minimum flexibility by optimizing the cross-sectional area of the bar.
本文给出了在桁架各杆横截面积不得为零时的实现满应力设计的必要条件。
This paper deals with the necessary conditions by which a full stressed design can be found while the area of each member does not vanish.
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