Syria's air force had dropped two cylinders containing chlorine gas on the Syrian city of Duma in April, 2018, killing 43 people.

2018年4月，叙利亚空军在叙利亚城镇杜马空投了两个装有氯气的气瓶，造成43人死亡。

Two different chemists in the 19th century left vinyl chlorine gas out in the sun, to discover that over time it transforms into a white solid.

19世纪，两位化学家将氯乙烯气放在阳光下暴晒，一段时间后发现它变成了白色固体。

Researchers like Bellingcat then used that material to investigate allegations of war crimes, such as the use of chlorine gas against civilians.

Bellingcat 等研究人员随后使用该材料调查战争罪指控，例如对平民使用氯气。

It's a molecule of methane that is reacted with a chlorine gas, resulting in three of the hydrogen atoms being replaced with chlorine atoms.

它是甲烷分子与氯气反应，导致三个氢原子被氯原子取代。

But other times the headlines have been really dark, like that chatbot telling that guy that he should divorce his wifeor that AI meal planner app proposing a crowd pleasing recipefeaturing chlorine gas.

但其他时候，头条新闻真的很黑暗，比如那个聊天机器人告诉那个人他应该和他的妻子离婚，或者那个人工智能膳食计划应用程序提出了一个以氯气为特色的大众食谱。

So, we plug that into the main formula -- chlorine gas has a molar mass of two times that of atomic chlorine -- 35.5 times two equals 70.9, and helium's molar mass is 4.00.

因此，我们将其代入主要公式——氯气的摩尔质量是原子氯的两倍——35.5 乘以二等于 70.9，氦气的摩尔质量为 4.00。

To date, part of it is controlled by government troops, part controlled by rebels, and United Nations officials are trying to figure out if an attack on the rebel-controlled part of Aleppo involved chlorine gas.

迄今为止， 它的一部分由政府军控制，部分由叛军控制，联合国官员正在试图弄清楚对阿勒颇叛军控制部分的袭击是否涉及氯气。