他们工作很努力只因为无人知晓而没没无闻的英文

they are very hard working and they are unsung because nobody knows what they are doing

• 他们:    they
• 工作:    work; operation; w ...
• 很:    very; quite; awful ...
• 努力:    make great efforts ...
• 只:    single; lonely
• 因为:    because; for; on a ...
• 无人:    unmanned
• 知晓:    know; be aware of; ...
• 没没无闻:    unsung