Ⅱ. 用法歸納
1. guarantee sth. / to do sth. / that 保證;擔(dān)保;許諾
2. guarantee sth. for some time 某物保修多長(zhǎng)時(shí)間
3. guarantee ... against ... 保證……免受……
4. guarantee sb. sth. 保證/擔(dān)保某人某事
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