全部

1·She learned to draw by tracing pictures out of old storybooks.

她通过描摹旧故事书上的图画来学绘画。《柯林斯英汉双解大词典》

2·The public is urgently requested to assist police in tracing this man.

公众被紧急要求协助警方追踪这名男子。《柯林斯英汉双解大词典》

3·The research effort has focused on tracing the effects of growing levels of five compounds.

研究集中跟踪5种化合物水平上升带来的影响。《柯林斯英汉双解大词典》

4·You can see that only by tracing a particular family line, possibly back to the 14th century or beyond, will you discover which version of a surname is yours.

你可以看到只有通过追溯一个特定的家族谱系，可能追溯到14世纪或更早，你才能发现哪个版本的姓氏是你的。

5·This is called contact tracing.

这被称为“接触者追踪”。

6·Contact tracing will be an important part of the process.

接触者追踪将会成为这个过程的一个重要部分。

7·That's why many people hope that digital contact tracing with smartphones will help.

这也是为什么很多人希望智能手机的数字接触者追踪可以有所帮助。

8·Most contact tracing apps collect information about where people have gone and the people they've had contact with.

大多数接触者追踪应用软件会收集关于人们去过哪里以及接触过谁的信息。

9·Get full service tracing.

获得全面的服务跟踪。

10·Otherwise, tracing remains turned off.

否则，跟踪还是关闭的。

(1)ray tracing光线追迹，射线跟踪

(1)tracing paper描图纸