I wasn't sure how fast to go.

我定有多远。

The date of his departure is uncertain.

他离开的日期尚未定。

I doubt if it will rain today.

我能定今天是否下雨。

They fixed on him to speak on their behalf.

他们已经定他作为代表发言。

Objective To confirm the serum pharmacochemistry of Xingnao Gutta Pills.

目的定醒脑滴丸血清药物化学。

It is not certain when it will take place.

能定这事什么时候发生。

A scan determines the position of the baby in the womb.

扫描可以定胎儿在子中的位置。

The prognosis for the economy is uncertain.

对经济的前景预测还定。

They are trying to decide where to situate the hospital.

他们正设法定医院的修建地点。

We got a fix on the missile launching site.

我们定了导弹发射场的位置。

His succession as headmaster was not in any doubt.

他继任校长是定无疑的。

In my opinion, the curvature was determined experimentally.

依我看，这种曲度是根据实验定的。

"Are you sure Lambie will come back today?"

"你定小羊今天吗?"

It is not yet certain who will succeed him.

谁接他的班还未定。

She is as yet undecided in which direction she wants to make her future career.

她还没有定自己事业发展的方向。

I myself am unsure how this problem should be handled.

我自己能定这个问题应该怎样处理。

It is possible to assign an exact date to this building.

这座建筑物的切年代是可以定的。

Objective to determinate recipe and producion craft of Armillarisin A Injection.

定亮菌甲素注射液处方及生产工艺。

She is responsible for the determination of wage levels within this company.

她负责定这家公司职员的工资标准。

Our holiday plans are still at an indeterminate stage.

我们的度假计划仍处于未定的阶段。