知识是最珍贵的财富，且被最严密地看守着。

The treasures of knowledge are the most rare, and guarded most harshly.

youdao

原来那污灵曾经多次抓住了他；他是常被看守着，又用锁才和脚镣捆锁好的；他竟把捆锁的挣断，被鬼催迫到野地来了。

Many times it had seized him, and though he was chained hand and foot and kept under guard, he had broken his chains and had been driven by the demon into solitary places.

youdao