我们反对这个议案，理由是它歧视女性。oppose / ə'pəʊz / v. to disagree with something such as a plan or idea and try to prevent it from happening or succeeding 反对；阻碍
bill / bɪl / n. a written proposal for a new law, that is brought to a parliament so that it can be discussed 议案，法案
on the grounds that 理由是......
discriminate against 歧视；排斥
【核心词汇】grounds
(plural 复数) a good reason for doing, believing, or saying something 充分的理由，根据
There are strong grounds for believing his statement.
有充分的理由可以相信他的话。
If something is grounds for a feeling or action, it is a reason for it. If you do something on the grounds of a particular thing, that thing is the reason for your action. 理由
【词组搭配 例句拓展】
1. grounds for (doing) sth作为……理由
Mental cruelty can be grounds for divorce .
精神折磨可以作为离婚的理由。2. have grounds to do sth 有理由(做某事)
Did the police have reasonable grounds to arrest him?警方有充分的理由逮捕他吗？
3. In the interview he gave some grounds for optimism.
采访中他给出了一些乐观的理由。4. on legal grounds 出于法律原因
5. on moral grounds 出于道德原因
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