The use of ultrasonic waves for diagnostic or therapeutic purposes, specifically to visualize an internal body structure, monitor a developing fetus, or generate localized deep heat to the tissues.

为了诊断或治疗而运用超声波，尤其是显示内部身体结构，监测发育中的胎儿或给组织施以局部深热。

youdao

You may think it is just a normal chocolate until you begin to taste the deep and rich heat of these special spices.

VOA: special.2010.02.17

People tack on all manner of technology to their homes to be green: solar panels, 100-foot-deep geothermal heat pipes and computerized climate zones.

FORBES: The House Goes Round

In a deep skillet or pot, heat the olive oil until hot.

WSJ: A Potent Brew

Windows with the shutters and curtains closed show up in the images in a deep blue colour, demonstrating little heat is escaping.

BBC: Shutters and curtains 'act as double glazing'