这个没有化学成分，却很容易起泡。
估算建立在预期的内部化学成分上，但我们从来没有实际地测量放射性物质在热量产生中发挥的作用。
Estimates have been made based on the expected chemical composition of the interior, but we've never actually measured the radiogenic contribution.
在这一年里，我和其他热爱这个游戏的人一样，认真地挤着公交车上班，认真地消费着各式各样的食品，不管里面有没有不认识的化学成分。
In the past year, I, just like others who love this game, diligently go to work on a crowded bus, diligently consume all kinds of food with no concern of whatever unknown chemicals (they may contain).
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