单词：vacua
n an empty area or space
n a region that is devoid of matter
n an electrical home appliance that cleans by suction
vacua的用法和样例：
例句
- The mixture is then distilled in vacua.然后混合物进行真空蒸馏。
- Consequently, as time goes on, different vacua can come into existence.所以，随著时间的进行，不同的真空便不断地诞生。
词汇搭配
- vacuum真空
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