This is a earth line rather than a live line.

这一根是零线而不是火线。

youdao

Chinese manufactures are difficult to connect the 'heaven and earth line' with large buyers in America.

原因是信息不对称，中国制造商难以和美国大型采购商搭通‘天地线’。

youdao

An eclipse happens when the earth and moon are in line with the sun.

地球和月亮与太阳处在一条直线上，日食就发生了。

《牛津词典》

One line is the equator. It is an imaginary line around the widest part of the Earth.

VOA: special.2010.07.14

When vetting companies for our portfolios, our seven-member investment committees look closely at their eco-credentials: hunting for positives (such as recycling programs, clean energy initiatives, an earth-friendly product line) and screening for negatives (toxic emissions, hazardous waste liabilities, harmful community impact).

FORBES: Brent Kessel

The earthquake happened along a line where the Earth's Indo-Australian and Eurasian tectonic plates grind together, in the waters west of Sumatra.

ECONOMIST: Deluged without warning | The

"Countries could just accommodate the divergence by not putting their clocks forward in the spring, so you'd change your time zone by one hour to bring civil time back into line with the Earth's rotation, " added Dr Whibberley.

BBC: Changes to the world's time scale debated