Equipotential connection may not connect with the manual or natural earthing to become earth-free equipotential connection.
等电位联结也可不与人工或自然接地体连接的，成为不接地的等电位联结。
2
The free people of Earth.
人间自由自在生活的人们。
3
The fear is that, at current consumption rates, that underground bunker will be empty within 20 years, leaving the earth almost helium-free by the end of the 21st century.