开始时的英文：
at the start

参考例句：

As analysis begins the analyst understands the problem
当分析开始时，分析员要理解问题，

Angiosperms begin as free zygotes immersed in a fluid.
被子植物开始时是浸沉在液体中的游离合子。

We take shelter in the hotel cellar when the civil war starts .
内战开始时，我们躲到了饭店的地下室里。

At the beginning he had no feeling except sheer incredulity
开始时他没有感觉，只觉得全然没法子相信。

We started with watercress soup which contained every possible vegetable known to man and beast.
我们开始时喝水田芥叶汤，里面还放入有各种蔬菜，简直是应有尽有。

At the outset
在开始时

She was lonely at the very start.
她开始时感到孤独。

Get off to a good,bad,etc start
开始时很好、不好等

At [from] the (very) outset
在开始时[从一开始]

Take the first steps;intend when starting
迈开最初的几步;开始时打算

start是什么意思：
n. 开始，起点；动身；开动；震惊，震动
v. 出发；开始，着手；发动；创办；惊起

Then It'started to break into pieces. These pieces started to move apart.
然后它开始分为很多块。这些分开的板块开始移动，分开。

He started coughing blood.
他开始咳血了。

His hearing has started to go.
他的听力开始衰退。

He gave a slight start.
他微微地震动了一下。

The engine won't start.
引擎发动不起来。