foolproof

绝对万无一失的

Used to emphasize that something is completely without any possibility of error.

用于强调某事完全没有任何出错的可能性。

实际上万无一失

Indicates that something is in effect, though not in fact, completely reliable.

表示某事物在效果上，尽管不是事实上，是完全可靠的。

几乎万无一失

Indicates that something is almost, but not entirely, reliable or infallible.

表示某事物几乎但并非完全可靠或万无一失。

是万无一失的

Indicates a state of being completely reliable or infallible.

表示完全可靠或万无一失的状态。

使某物万无一失

To design or alter something so it cannot fail or be used incorrectly.

设计或更改某物，使其不会失败或被错误使用。

看似万无一失

Suggests an appearance of being completely reliable or infallible.

表明看起来完全可靠或万无一失。