形容词
中文翻译：不可见的
同义词：
['unseen', 'undetectable', 'imperceptible例句：1. The invisible line between the two countries is often difficult to trace.（两国之间的那条看不见的分界线往往难以追踪。）']
例句：
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1. The invisible line between the two countries is often difficult to trace.
两国之间的那条看不见的分界线往往难以追踪。
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2.The invisible force of gravity makes us feel small and insignificant.
重力的无形力量让我们感到渺小和微不足道。
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3. The invisible web of social media has become an integral part of our daily lives.
社交媒体的无形网络已经成为我们日常生活的一部分。