Backward, flow backward, o tide of the years!

噢，岁月的潮汐，后退，向后退！ ！

youdao

As the refrigerant does not flow backward before it flows into a compression space, it is possible to improve the compression efficiency.

由于在制冷剂流入压缩空间前制冷剂不会回流，所以能够提高压缩效率。

youdao

Valve regurgitation is a condition in which valves don't close tightly, allowing blood to flow backward across the valve. Symptoms include shortness of breath, fatigue and heart palpitations.

瓣膜回流是由于瓣膜关闭不全，致使血液通过瓣膜回流，症状包括呼吸短促、疲劳和心悸。

youdao

Although Cook was dropped on 15 when he pulled Zaheer to RP Singh at backward square-leg, runs were starting to flow when Prior - out seven times in the 30s in his 17 previous ODI appearances - flayed Munaf Patel high in the air to point, where Piyush Chawla pouched the ball.

BBC: Inspired England take series lead