He neglected to be responsible for the function of the pump. The vapour was ignited by an upright torch.
从上面句子中，我们学习responsible/rɪˈspɒnsəbl/ adj 负责的；有责任的，responsible来自respond/rɪˈspɒnd/ v 回应；相应，可以认识词根-pond-承诺！
通过-pond-承诺，我们熟悉一下下面的单词：
respond v 回应；响应responsible adj 负责的；有责任的
对比：reply/rɪˈplaɪ/ v/n 回答；回复。reply指更广泛的回应（口头回答、书面回复、电子邮件回复）；而respond更侧重于对情况、事件或刺激的有意义反应。
I asked him his name, but he didn't respond.
How did they respond to the news?
The car responds very well to the controls.（controls /kənˈtrəʊlz/ n 管理；控制）
respond
to reply to a question/an advertisement
He never replied to any of my letters.
The terrorists replied to the government's statement with more violence.（terrible/ˈterəbl/ 可怕的；terrify/ˈterɪfaɪ/ 使害怕；使恐惧；terrorist/ˈterərɪst/ 恐怖分子。但是terrific/təˈrɪfɪk/极好的！violence/ˈvaɪələns/ n 暴力；暴行。violent adj 暴力的，剧烈的）
replay更加的具体
correspond/ˌkɒrəˈspɒnd/ v 相一致（类似）；符合就医：cor~com，共同反应，行动一致，利益相符！
Your account of events does not correspond with hers.（account/əˈkaʊnt/ n 解释；账户）
This period corresponds with the liturgical season of Christmas.（litrugical/lɪˈtɜːdʒɪkl/ adj 礼拜式的）
The working of this machine corresponds to that of the human brain.相当于/类似
correspondence/ˌkɒrəˈspɒndəns/ n 来往信件；通信
despond/dɪˈspɒnd/ v/n 灰心，失望personal/private correspondence 私人来往信件
the correspondence column/page 读者来信专栏I refused to enter into any correspondence
We have been in correspondence for months.
That he didn't finished the work on time despond me
He was sinking into the Slough of Despond（sink v 沉！；slough/slʌf , slaʊ/ n 泥沼）
Man's Dream of Escaping from "the Slough of Despond" 逃出绝望之渊
despondent/dɪˈspɒndənt/ adj 沮丧的；失望的 despondency n
sponsor/ˈspɒnsə(r)/ n 赞助商；发起人 v 赞助；主办A despondent loser, mood, look
She was becoming increasingly despondent about the way things were going.（increase/ɪnˈkriːs , ˈɪŋkriːs/ 增加。crea~create创造，in强盗，decrease 减少，降低）
a mood of despondency 沮丧的心情
记忆：spon-承诺，-or人。承诺给你出钱，投入资金的人！金主爸爸！！！
The race organizers are trying to attract sponsors.（race n 比赛 radical adj 激进的）
I'm collecting sponsors for next week's charity run.（charity/ˈtʃærəti/ n 慈善；慈善机构。）
the sponsor of the new immigration bill（migrate/maɪˈɡreɪt/ v 迁移；immigrate （从外地来）移民~emigrate 移居国外。immigration n 移民。bill/bɪl/ n 账单；法案 v 给开账单）
sponsor
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