Many drugs were found by trial and error.

很多药物都是通过反复试验才发现的。

互联网 2025-01-18 10:19:49

重点词汇

相关例句

1、

She looked at Jane, smiled shook by turns.

她一会儿望望吉英, 一会儿笑笑,一会儿摇摇头.
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2、

The two workers carried the load by turns.

这两个工人轮流超负荷工作.
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3、

When Mary had a fever, she felt cold and hot by turns.

玛丽发烧时, 她感到忽冷忽热.
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4、

When John had a fever, he felt cold and hot by turns.

约翰发烧时感到冷一阵,热一阵.
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5、

The two sisters took care of their sick mother by turns.

两姐妹轮流侍候生病的母亲.
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6、

You two will stay with the sick person by turns.

你们二人轮流地看守这位病人.
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7、

When George had a fever, he felt cold and hot by turns.

当乔治发烧的时候, 他感到一阵发冷一阵发热.
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8、

The old Roman armies had several generals who took command by turns.

古罗马的军队由几位大将轮流指挥.
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9、

Those of my own life , who by turns had flung.

我自己的年华, 把一片片黑影接连着.
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10、

Walling and resting by turns , he wandered about until noon without the energy to solicit fares.

走一会儿,坐一会儿, 他始终懒得张罗买卖.
来源：汉英文学 - 骆驼祥子
11、

Mary and Jane rode by turns.

玛丽与珍尼轮流骑马.
来源：词典精选例句
12、

He gets cheerful and depressed by turns.

他的情绪高一阵低一阵.
来源：词典精选例句
13、

We did the work by turns.

我们轮流干这活.
来源：《简明英汉词典》
14、

We went out by twos.

我们两个两个走出去.
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15、

People came by twos and threes.

人们三三两两地来了.
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16、

He could count by twos.

他已经学会数奇偶数了.
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17、

Soon the guests by twos and threes.

不久客人就三三两两地到达了.
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18、

The boys come in toghter and go out by twos and threes.

男孩子们一起进来,又三三两两的出去了.
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19、

Franklin could count by twos, and tie his shoes.

富兰克林已经学会奇偶数了, 他还学会了自己系鞋带.
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20、

They came home from church by twos and threes.

他们三三两两地从教堂回来.
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