The Pentax ME-F, which used focus sensors in the camera body coupled with a motorized lens, became the first autofocus 35 mm SLR in 1981.

宾得我，男，该传感器用于集中在机身加上机动镜头，成为第一个自动对焦35毫米单镜反光相机于1981年。

youdao

The blocking glue of cancerous serosa (f TH glue) is unharmful to human body.

癌肿浆膜面封闭胶(简称f - TH胶)是一种对人体无害的覆盖胶。

youdao

The main landing gears retract into body-side bays, indicating the likely presence of F-22-style side weapon bays ahead of them.

主起落架收入机身一侧的起落架舱，这意味着很可能其前面有类似F-22 的机侧武器舱。

youdao

F = ma is universally true, independent of the nature of the force acting on a body.

= ma 是一条普适定律,与作用在物体上的力的属性无关

耶鲁公开课 - 基础物理课程节选

The free-body diagram, it says you can pick any one body that you like and apply F = ma to it, provided you identify all the forces acting on that body.

所谓隔离法,就是说你可以任意 选取一个物体,分析出它所受的所有力后,单独对其运用 F = ma 进行计算

耶鲁公开课 - 基础物理课程节选

The dogs were clinically dead, with no heartbeat, respiratory functions, or brain activity, but their tissues and organs were perfectly preserved because the procedure lowers the body temperature to about 50 degrees F.

FORBES: The Prospects of Short Term Cryonics

With RW Martin Erat out with an upper-body injury, 19-year-old F Tom Wilson, a 2012 first-round draft pick, made his Capitals debut.

WSJ: Capitals top Rangers 2-1 in OT, take series lead