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

youdao

The Delta IV Heavy has since completed several more successful lift-offs, while its next launch is currently planned from Vandenberg Air Force Base, California, USA, next month.

Delta 4型重型运载火箭之后又成功完成了更多次的运载任务，目前它的下一次发射定于下个月在美国加州Vandenberg空军基地进行。

youdao

The launch of the Delta IV rocket carrying the satellite had been scheduled for Friday, but was scrubbed at the last minute due to weather conditions at Cape Canaveral Air Force Station in Florida.

该卫星携带的德尔塔iv火箭发射已定于星期五，但在最后一分钟时，由于天气卡纳维拉尔角空军基地的条件在美国佛罗里达州擦洗。

youdao

They are a mixture of Green Berets, Rangers and the Delta Force from the Army, the Seals (which stands for Sea-Air-Land) from the Navy and the Air Force's combat controllers and para rescue teams.

BBC: Snipers

He worried the troops would reject him because he had not served in any of its elite units such as the Army's Delta Force or the Navy's SEAL Team 6.

NPR: McChrystal Takes Blame For Rolling Stone Article

According to some press reports the attack at Abiteye in Delta State was carried out by oil thieves angry that the military Joint Task Force in the Niger Delta is succeeding in its effort to stop illegal oil bunkering in the area, thereby jeopardising the livelihood of local bandits who often masquerade as militants.

ECONOMIST: A big rebel group in the Niger Delta calls off its ceasefire