bolt: [OE] In Old English, a bolt was an arrow, particularly of the short stout variety used in crossbows (hence the phrase shoot one’s bolt). The more familiar modern sense ‘fastening pin’ developed in the 13th century. The verbal sense ‘make a quick escape’ comes from the notion of firing a projectile. The word appears in other Germanic languages (for instance German bolz ‘bolt’), but its ultimate origin is unknown.
bo
权威例句
1. Suddenly a bolt of lightning crackled through the sky.
突然一道闪电划破长空。
来自柯林斯例句
2. If the soil dries out the plants may bolt.
如果土壤过干，植株可能会过早结实。
来自柯林斯例句
3. Loosen the bolt so the bars can be turned.
松一松插销，好转动门闩。
来自柯林斯例句
4. I bored a hole so that the fixing bolt would pass through.
