They detected a heavy hydrogen molecule called hydrogen deuteride.
他们探测出了一种叫做氘化氢的高质量氢分子。
英语百科
Hydrogen deuteride
Hydrogen deuteride is a diatomic molecule substance or compound of the two isotopes of hydrogen: the majority isotope H protium and H deuterium. Its proper molecular formula is HH but for simplification it is usually written as HD.