Question

急求一题单词拼写答案，具体见补充

This volunteer work takes each of them several hours a week .So it is a major c_____.(奉献）

Answer 1

contribution [ˌkɔntri'bju:ʃən]
n.贡献, 捐款(赠)
例句:
Don't undervalue Jim's contribution to the research.
不要低估了吉姆在研究工作中的贡献。
There was no mention of her contribution.
没提到她的贡献。
I'll try to wangle a contribution out of him.
我要设法让他出把力。

追问

偶突然想起来commitment行不行？

追答

个人觉得contribution更符合“奉献”，“commitment“侧重“承诺”和“投入”，参考下下面的英文解释吧。
contribution
1.contribution contributions
If you make a contribution to something, you do something to help make it successful or to produce it.
American economists have made important contributions to the field of financial and corporate economics.
He was awarded a prize for his contribution to world peace.
N-COUNT: oft N to n
2.contribution contributions
A contribution is a sum of money that you give in order to help pay for something.
This list ranked companies that make charitable contributions of a half million dollars or more.
N-COUNT: oft N of n
= donation
3.contribution contributions
A contribution to a magazine, newspaper, or book is something that you write to be published in it.
N-COUNT

commitment
1.commitment
Commitment is a strong belief in an idea or system.
...commitment to the ideals of Bolshevism.
N-UNCOUNT: oft N to n
2.commitment commitments
A commitment is something which regularly takes up some of your time because of an agreement you have made or because of responsibilities that you have.
I've got a lot of commitments.
Work commitments forced her to uproot herself and her son from Reykjavik.
N-COUNT
3.commitment commitments
If you make a commitment to do something, you promise that you will do it. (FORMAL)
We made a commitment to keep working together.
They made a commitment to peace.
N-COUNT: usu N to-inf, N to n
4.commitment commitments
Commitment is the process of officially sending someone to a prison or to hospital. (AM; in BRIT use committal)
N-VAR