Undercurrents
n. 潜流, 暗流( undercurrent的复数形式 ); 潜在的感情、影响或倾向（尤指与表面相反的）
🗣️ 情景例句
She has a very strong personality.
她个性坚强。
You have too much time on your hands. Why don't you start a hobby?
你有太多的空闲时间，何不开始一样嗜好呢？
Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
人一旦能用语言同别人交流思想，知识的积累便开始了。