（图片仅供参考）
The “tonne of TNT” is a unit of energy used to quantify large energy releases, particularly from explosions. It is conventionally defined by international agreement as 4.184 gigajoules (GJ). This value is based on the calculated energy density of TNT upon detonation, which is approximately 4,184 J/g. It serves as a standard reference for comparing the yields of nuclear weapons and other explosive events.
吨TNT当量是能量的标准化计量单位，并非直接测量一吨TNT释放的能量。TNT的比能量会因密度和密闭性等条件而异，但为了方便起见，我们选择1000热化学卡路里/克（4.184千焦/克）作为代表性数值。这种约定使得我们可以对不同爆炸源（从常规炸弹到热核装置和自然灾害）的破坏力进行一致且易于理解的比较。
The unit’s adoption was driven by the need for a simple metric during the Cold War to describe the immense power of nuclear arsenals. A “kiloton” (kt) is equivalent to one thousand tonnes of TNT (4.184 terajoules), and a “megaton” (Mt) is one million tonnes of TNT (4.184 petajoules). For instance, the atomic bomb dropped on Hiroshima had a yield of approximately 15 kilotons. This system provides a relatable scale, anchoring the abstract concept of massive energy release to the known power of a conventional chemical explosive. The unit is also used in 天体物理学 to describe the energy of supernovae or gamma-ray bursts, and in geology for events like the Chicxulub impactor, estimated to have released energy equivalent to millions of megatons of TNT.
吨TNT（能量单位）
（如果日期未知或不相关，例如“流体力学”，则提供其显著出现的近似估计）
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