Actually, these selection rules are not ironclad.實際上, 這些選擇規則并不是嚴格的.That is an ironclad fact that is beyond controversy.這是鐵的事實,無庸置辯.an ironclad contract不可動搖的契約The case for testing now is ironclad.正在接受檢驗的這一論據牢不可破。...ironcl...

That is an ironclad fact that is beyond controversy.這是鐵的事實,無庸置辯.The case for testing now is ironclad.正在接受檢驗的這一論據牢不可破。Actually, these selection rules are not ironclad.實際上, 這些選擇規則并不是嚴格的....

ironclad的音標：ironclad的英式發音音標為：['a??nkl?d]ironclad的美式發音音標為：['a??n?kl?d]...