1、The cardiogram is a chart and charts are what I work with.
心電圖是圖表的一種，而我每天面對的就是圖表。

2、A cardiogram is necessary
需要查一下心電圖。

3、The cardiogram is a chart and charts are what I work with
心電圖是圖表的一種，而我每天面對的就是圖表。

4、A cardiogram is necessary.
需要查一下心電圖。

cardiogram翻譯