"以百叶窗遮闭" can be translated into English as "to block off with shutters" or "to cover with shutters".
Here are some example sentences to illustrate the usage:
We decided to block off the windows with shutters to keep out the afternoon sun.
(我们决定用百叶窗遮住窗户,以挡住午后的阳光。)
The house was covered with shutters to protect it from the storm.
(房子用百叶窗遮住,以抵御风暴。)