Two types, or isotopes, of hydrogen are used - deuterium and tritium.

它使用两种类型，或称同位素，的氢——氘和氚。

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The best fuels for fusion are two types, or isotopes, of hydrogen - deuterium and tritium.

最好的核聚变材料有两种，即氢的同位素——氘和氚。

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Nuclear fusion of deuterium and tritium at high temperatures releases enormous amounts of energy.

高温下氘和氚的核聚变释放巨大的能量。

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An alternative is Inertial confinement fusion (ICF), in which fusion of nuclei is initiated by heating and compressing a fuel target, typically in the form of a pellet containing deuterium and tritium contained in a device called a hohlraum (hollow space or cavity) using an extremely powerful laser.

FORBES: U.K. And U.S. Join Forces on Laser-Fusion Energy