Full touch with the palm of the hand is warm and affectionate while touching with the fingertips betrays less affection.

全手掌接触体现了热情和喜欢，而用指尖接触则表示缺少感情。

youdao

He cupped her chin in the palm of his hand.

他窝起手掌托住她的下巴。

《柯林斯英汉双解大词典》

He smacked a fist into the palm of his hand.

他用拳头啪地猛击一下手掌。

《牛津词典》

More phones will be able to support Facebook giving even more people access to their online communities from the palm of their hand.

VOA: standard.2010.07.23

Now Susan Mayne, who is a Professor here in the School of Public Health, has done some very interesting work with an electronic device that can be passed over the palm of your hand and measures pigmentation in the hand as a way to assess vegetable intake in people.

苏珊·梅恩,我们公共卫生学院的教授,做了些值得关注的工作,通过电子设备,扫描你的手掌,测算其上色素沉淀,可以得出人们蔬菜的摄入量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In particular, Neanderthals wielded their tools in a so-called power grip held in the palm of the hand with the fingers curled around the body of the tool.

ECONOMIST: Gaining the upper hand

The control systems weighs a little more than half a pound, fits in the palm of the hand and operates on a single battery for the better part of a year.

FORBES: Smart Guns Key to Next-Gen Soldier Systems

The company also said the Nexus S is the first smartphone to feature a four-inch contoured display, designed to better fit the palm of the hand and the side of user's face.

WSJ: Google to Release New 'Nexus' Phone