Brown apparently delayed the announcement, and managed to keep it secret from the entire cabinet.

布朗显然推迟了宣布，并设法对整个内阁保密。

He agrees to keep it secret.

他同意保守秘密。

You had better keep it secret.

你最好要把这件事保密。

It is very important to keep the Star Zoo alive and so it is necessary to keep it secret.

让星际动物园存活下去十分重要，所以需要保密。

The young man's abuse was chronic and he went to great lengths to keep it secret.

这个年轻人受到了长期的虐待，而他也尽自己最大的力量去保守这个秘密。