这是一个锐角。

It is an acute Angle.

这两条线相交成锐角。

The lines are at an acute angle.

这个斜面锐角使进气口的气流纵向流变。

The ramp sits at an acute Angle to deflect the intake airstream from the longitudinal direction.

毛细血管部分成锐角折返，亦可见毛细血管盲端。

Some vessels turned back to be acute angles and some were observed as blind channels.

贲门胃底角是抑制胃内食物返流的重要因素之一，它通常为一锐角。

The Angle between the cardia and the fundus of the stomach is an important factor in preventing the reflux of food from the stomach to the esophagus.