There were some concerns about a substance, though, called anhydrous ammonia.
尽管称为无水氨,但有些人对这种物质表示担心。
单词 | anhydrous ammonia |
例句 |
原声例句
CNN 听力 2013年4月合集 There were some concerns about a substance, though, called anhydrous ammonia. 尽管称为无水氨,但有些人对这种物质表示担心。 |
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