| 单词 | vacuum flask |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔strongly〕The vacuum flask has a strong casing, which won't crack or chip.这种热水瓶瓶身坚固，不易断裂破碎。柯林斯高阶〔strong〕The vacuum flask has a strong casing, which won't crack or chip.这种热水瓶瓶身坚固, 不会轻易断裂破碎。外研社新世纪 |
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