Yesterday's meeting was unproductive because nobody had read the proposal beforehand.

昨天的會議毫無成效，因為沒有人事先讀過提案。

The factory shut down two unproductive assembly lines to cut operating costs this quarter.

這家工廠本季關閉了兩條沒有產能的組裝線，以降低營運成本。

Many employees say long email chains make their afternoons feel unproductive and stressful.

許多員工表示，冗長的電子郵件往來讓他們的下午既沒效率又有壓力。