The phrase "a system that guards" is correct and usable in written English.
You can use it when describing a mechanism or process designed to protect or secure something.
Example: "The company implemented a system that guards sensitive data against unauthorized access."
Alternatives: "a mechanism that protects" or "a framework that secures".
"Of course we need a welfare system that guards against abuse, but this government is now causing real hardship and worry to many who have done nothing to cheat the system and are desperate to work.
This political system is empowered by a strong legislative and judiciary system that guards these rights, and clarifies the duties.
President Clinton's aides initially thought that they had the perfect plan for building a missile shield over the United States, a system that would guard against nuclear, biological and chemical threats without plunging the United States into a bitter tug of war with the Russians.
President Clinton's aides initially thought that they had the perfect plan for building a missile shield over the United States, a system that would guard against nuclear, biological and chemical threats without plunging the United States into a bitter tug of war with the Russians.
In Chicago, Duhon was part of a crowded backcourt and played in a system that favored scoring guards.
Enthusiasts will argue that it ruins brake response and pedal feel in most cars, and everyday drivers can be caught off guard by a system that sometimes applies much more stopping force than expected.
Head coach Tommy Amaker and the Crimson are making their third consecutive tournament appearance with a system that translates well to March: quality guard play, offensive discipline and consistent defensive effort.
This is a system that didn't protect survivors but instead protected the perpetrators ― the foxes guarding the hen house. .
"There is something healthy about a system that does that," Bush observed at the time, as he congratulated Palestinian voters for rejecting "the old guard".
[C7.] Incentive Program for Hospitals Four big New York companies will announce a $2 million incentive program today to encourage hospitals in the state to improve patient safety by requiring doctors to use computerized systems that guard against errors.
