The preparatory bell for class has already sounded.

There are three stages in writing. The first is the preparatory stage.

写作分为3个阶段: 首先是准备阶段.

He used to have a cup of coffee preparatory to his work.

在工作之前,他总要喝上一杯咖啡.

Security checks had been carried out preparatory to (= to prepare for) the President's visit.

为迎接总统来访，当局已预先进行了安全检查。

preparatory drawings

草图

At least a year's preparatory work will be necessary before building can start.

在开始动工之前至少要做一年的准备工作。

The outbreak of the Second World War so that the preparatory work come to a halt.

第二次世界大战爆发使筹备工作停顿下来.

The partners held several meetings preparatory to signing the agreement.

合伙人在签订协议之前举行了几次会议。

Her son is studying in a preparatory school.

她儿子正在一所大学预备学校学习.

I am attending college preparatory school.

我在读大学预科.

You should go first college preparatory school before your university dream come true.

在你的大学梦成真之前,你得先去预备学校就读.

Everything should be done in order to prepare against fire.

应该尽一切可能预防火灾.

To avoid lead from water pipes, use cold water to prepare food and drinks.

为了避开来自水管的铅, 可以使用冷水来准备食物和饮料.

To avoid lead from pipes, use cold water to prepare food and drinks.

为了避开来自水管的铅, 可以用冷水准备食物和饮料.

Prepare food in accordance with portion and quality standards specified in recipes.

依照菜谱中份量和质量的标准烹调食品.

He asked us to prepare for a quiz.

他要我们准备好测验.

Will you help me prepare for the get-together of the old classmates?

你能否帮我为这次老同学聚会做好准备工作?

They made a fire to prepare for supper.

他们生火做晚饭.

The teacher instructed the class to prepare for a test.

教师通知这一班学生准备测验.

We must prepare for the worst.

我们必须做最坏的打算。

She rolled up her sleeves and began to prepare for supper.

她卷起袖子开始准备晚餐.