If you describe a guarantee or plan as ironclad, you are emphasizing that it has been carefully put together, and that you think it is absolutely certain to work or be successful.
例句
...ironclad guarantees of safe passage...安全通行的絕對保證The case for testing now is ironclad.正在接受檢驗(yàn)的這一論據(jù)牢不可破。
英漢詞典釋義
adj.
<美>嚴(yán)格的
an ironclad contract不可動(dòng)搖的契約That is an ironclad fact that is beyond controversy.這是鐵的事實(shí)，無庸置辯。
英英詞典釋義
Adjective
1. inflexibly entrenched and unchangeable;
"brassbound traditions""brassbound party loyalists""an ironclad rule"