Don't get things mixed up, just the z component of the force becomes Gm triple integral of delta cos phi sine phi d rho d phi d theta.

不要搞混，只是力的z分量罢了,它是Gm∫∫∫δcosφsinφdρdφdθ

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Dacromet coating solutions prepared with mixed metal powders are easy to be dispersed with short-time agitation and have good anti-settlement and covering force.

混合处理后的粉末配制的达克罗涂液易分散，搅拌时间短、抗降沉性好、遮盖力强。

youdao

An expression of energy difference rate in a plate of non-uniform thickness with a crack of mixed mode under both body force and surface tractions in a non-uniform temperature field is derived.

本文推导出了含复合型裂纹的变厚度板在承受体力和面力、存在非均匀温度场的情况下的能量差率表达式。

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But Khartoum has also stymied the United Nation's effort to mount a mixed international force to keep the peace in Darfur.

NPR: Darfur Casts Shadow Over Khartoum's Ambitions

"Baggage, " by the Cape Town-based artist Randy Hartzenberg, is an abstract portrayal of the white-minority government's campaigns in the 1970s to force black, mixed-race and ethnically Indian South Africans into separate townships.

WSJ: South Africa's Wits Art Museum to Open in Johannesburg

Reaction has been mixed in Mexico to the show of force displayed by Latinos in the U.S. Much of he media has given the demonstrations far less space than American media.

NPR: Immigration Activists Target U.S. Businesses in Mexico