| 单词 | 以防炸弹穿透 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔penetrate〕The exterior walls are three to three and a half feet thick to prevent penetration by bombs.外墙厚3到3.5英尺，以防炸弹穿透。柯林斯高阶〔penetration〕The exterior walls are three to three and a half feet thick to prevent penetration by bombs.外墙厚度为3至3.5英尺, 以防炸弹穿透。外研社新世纪 |
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