The gas inhibits acetylcholinesterase, an enzyme responsible for the breakdown of a chemical messenger responsible for muscle control, which is how it causes much of its ill effects.

而在神经与肌肉之间充当“信使”的是一种叫做乙酰胆碱酯的酶，神经毒气正是通过抑制这种酶的工作来发挥作用的。

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Personally, as a pharmacist, I always feel uncomfortable recommending a chemical solution to every ill that comes along.

个人而言，作为一名药剂师，当推荐用一种化学溶液来治疗每个伴随疾病的时候，我总是感到不舒服。

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The Chinese State Administration of Quality Supervision, Inspection and Quarantine said the amount of the chemical found in the milk would not cause ill effects in adults who drank less than two liters a day.

CNN: Almost 13,000 Chinese children sickened by tainted milk

Four people had to be treated at London Bridge Station after being taken ill in what was initially feared to be a chemical incident.

BBC: London Bridge station chemical fear after four fall ill

Chemical weapons are likelier to be effective, and therefore used, against undefended or ill-defended targets.

CENTERFORSECURITYPOLICY: Toxic treaty: how not to ban chemical weapons