treɪs verb
3
HISTORY/DEVELOPMENT
历史/发展
to study or describe the history, development, or progress of something 研究…的历史; 探索…的发展; 追寻…的轨迹
5
WITH YOUR FINGER
用手指
to draw real or imaginary lines on the surface of something, usually with your finger or toe 〔通常用手指或脚趾在物体表面〕画〔线〕, 留下〔印迹〕
noun
9
TELEPHONE
电话
a search to find out where a telephone call came from, using special electronic equipment [术语] 〔利用特殊电子设备对电话的〕追查,追踪 C | technical
10
INFORMATION RECORDED
记录的信息
the mark or pattern made on a SCREEN or on paper by a machine that is recording an electrical signal [术语] 〔记录电信号的机器在屏幕或纸上作的〕描记线 C | technical
这条描记线显示了心脏跳动的情况。