Do not swap horses when crossing a stream.

Positive control of the blood pressure, selection of appropriate anticoagulant and protection of RRF have important clinical significance.

积极控制血压、选用恰当的抗凝方法以及保护RRF有着重要的临床意义。

RRF and amount of urine were measured before and after 6,12,24 months' treatment respectively.

分别检测两组患者透析前及透析后6、12、24个月的RRF及尿量。

The FRR and RRF digital filtering methods and their realization are discussed.

讨论了FRR与RRF数字滤波方法及其实现。

Objective To evaluate the effect of residual renal function ( RRF) on hemodialysis patients.

目的观察残余肾功能（RRF）对血液透析患者的影响。

Those who could not write signed with a cross.

不会写字的人画十字代替签名。

You can't cross the road ─ it's like a racetrack.

那条马路像赛车道一样，你不要横过那条马路。

They crossed the finishing line together.

他们同时越过终点线。

Look left and right before you cross the road.

左右看一看，然后再过马路。

You take your life in your hands just crossing the road here.

你在这里过马路简直是冒险玩命。

I was quite cross with him for being late.

我因他迟到而十分生气。

Be careful crossing the main road.

过大马路时小心点儿。

Look both ways before crossing the road.

横过马路前要朝左右两边看一看。

The roads cross just outside the town.

这些道路正好在城外交叉。

She wore a small gold cross on a chain around her neck.

她脖子上戴了一条项链，上面挂着个金的小十字架。

Our letters must have crossed in the mail.

我们的信一定是在路上交叉了。

The straps cross over at the back and are tied at the waist.

带子在背后交叉，然后系在腰部。

We can cross his name off; he's not coming.

他不来了，我们可以把他的名字画掉了。

It never crossed my mind that she might lose.

我从来没想过她会失败。

Be careful not to cross the line.

小心别越过道路的中界线。

I was cross with him for being late.

我因他迟到而十分生气。