1. Actually, these selection rules are not ironclad . 实际上，这些选择规则并不是严格的。
2. Britain 英国第一艘远洋装甲战艇“勇士号”下水。
3. Compares in Badier is nearly ironclad when the regular season will start returns to the unit, Alston "internal injury" instead anxious. 相比于巴蒂尔几乎铁定将在常规赛开始时归队，阿尔斯通的“暗伤”反而更令人揪心。
英英解释
n.
1. a wooden warship of the 19th century that is plated with iron or steel armor
2. sheathed in iron plates for protection
3. inflexibly entrenched and unchangeable
