The uranium or plutonium isotopes are referred to as "fissile," which means we can use them to induce fission by bombarding them with free neutrons.
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
Unlike them, it has refused to sign the test-ban treaty. Unlike them, it declines to end the production of fissile material-uranium and plutonium-for bombs.
与五个核大国不同，它拒绝签署禁止核试条约，它拒绝中止核燃料(铀和钚)生产。
"The uranium or plutonium isotopes are referred to as" fissile, "which means we can use them to induce fission by bombarding them with free neutrons."
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
In particular, strengthening the control on " weapon-usable" fissile materials-highly enriched uranium (HEU) and separated plutonium is essential.
加强控制武器用裂变材料——高浓铀（HEU）和分离钚是极为本质的。
Only three fissile materials are known at present, there being U-233, U-235, and plutonium.
目前已知有三种裂变材料，它们是铀233，铀235，以及钚。
Plutonium can be extracted from nuclear wastes and expensively reused in special sorts of fuel, but it can also be fashioned into the fissile core of a weapon.
钚可以从核废料提取，并可作为某种昂贵燃料重新加以利用。然而钚也可以加工成武器中用于核裂变的核心部件。
Plutonium can be extracted from nuclear wastes and expensively reused in special sorts of fuel, but it can also be fashioned into the fissile core of a weapon.
钚可以从核废料提取，并可作为某种昂贵燃料重新加以利用。然而钚也可以加工成武器中用于核裂变的核心部件。
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