на полпути между ... и
• This temperature fell midway between Venus and the Earth.
• Free radicals lie midway (or halfway) between carbonium ions and carbanions.
Русско-английский научно-технический словарь• This temperature fell midway between Venus and the Earth.
• Free radicals lie midway (or halfway) between carbonium ions and carbanions.
Русско-английский научно-технический словарь