I had bolted the door the instant I had seen the bat.是什么意思？

I had bolted the door the instant I had seen the bat.

我一看到蝙蝠就把门闩上了。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

bolted

v. 闩上( bolt的过去式和过去分词 )，冲出去，逃跑，又作(bolt down) 狼吞虎咽；

例句
...the heavy bolted doors.
紧锁的大门

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

door

n. 门，户，出入口，一家[户]，通道；

例句
She never even acknowledged the man who opened the door for her...
她对为自己开门的男士甚至连一点表示都没有。

instant

n. 瞬间，顷刻，此刻，当月，速食食品，即溶饮料；adj. 立即的，迫切的，正在考虑的，目前的，即食的；

例句
In the 1970s Kodak, anxious to get in on the act, launched its own instant camera.
20世纪70年代，急于分一杯羹的柯达公司推出了自己的拍立得相机。

seen

v. 看见( see的过去分词 )，观看，领会，考虑；

例句
Holiday spots have seen a dramatic revival and tourist chiefs are competing for a slice of the action.
各个度假点重又呈现出一派兴旺景象，旅游业的龙头老大们都在争着分一杯羹。

bat

n. 蝙蝠，短棍，（棒球等的）球棒，（网球等的）球拍，白话，口语，成语，俗话，（口）打击，猛击，（海上）导弹；vt.& vi. 用球板击球，用球棒击球（尤指板球或棒球运动）；

例句
The old judge doesn't like the thought of no one going in to bat for the accused.
老法官不希望没有人为被告辩护。