放慢的英文：
go slow
rein in
rein up
slacken

参考例句：

Ease up; relax;reduce
放松;放慢

check or slow down the action or effect of.
停止或放慢行动或影响。

The fast driver needed to ease up on the speed.
开快车的司机必须放慢速度。

He slowed his horse to a canter.
他放慢马速使之慢跑。

The driver had to let off the gas pedal to slow down.
驾驶员必须放开油门以使车速放慢。

The increasing economy of every place around the world has not slowed down for the sake of this reason.
世界各地的经济增长却并未因此放慢。

Mobile service still occupied the maximum quotient in telecom industry but its speed slowed down.
移动业务依然占据通信产业的最大份额但增长速度放慢。

The owner of the umbrella slowed his steps. Soapy did the same.
伞主人放慢了脚步。苏比也放慢脚步。

He slowed down his steps intentionally in order for me to catch up.
他有意放慢脚步,让我能够追赶上他。

Move slowly and savor the journey before you jump into romance
在坠入爱河之前，要放慢速度充分享受这段美好时光。

slow是什么意思：
adj. 慢的，迟钝的；清淡的；慢速的；不乐意；曝光慢的
adv. 慢慢地
v. （使）缓行，（使）减速

Be slow to promise and quick to perform
不轻诺,诺必果

Slow and steady wins the race
跛鳖千里

The twisting and moving slowed down.
旋转和转动的速度降了下来。

rein是什么意思：
n. 缰绳；控制，驾驭
v. 控制，驾驭；勒住（马）

He reined in to a jog.
他勒紧马缰绳使马缓步前进。

You should strain at the reins.
你应该拉紧缰绳。

A rein joining the bit of one of a span of horses to the driving rein of the other horse.
缰绳系于共轭马中一匹的挽具与其它马的缰绳之间的缰绳。

slacken是什么意思：
v. （使）松弛；（使某物）放慢，迟缓

There is no reason to believe that this pace will slacken.
没有理由认为这个速度会下降。

The demand for coal begins to slacken off in the spring.
煤的需求在春天开始减少。

The bonds of traditional family life began to slacken.
传统的家庭生活的纽带开始松弛。