Traducción & Definición
certain: seguro 
            
            
(In a) certain (way): (De) cierta, determinada (manera) 
            
            
En este caso, "certain" precede siempre a un sustantivo.
Ejemplos
- "It may sound like an accident waiting to happen, but certain high-profile university professors are researching powering aircraft with on-board nuclear reactors."
 - "-Remember, there may be times when the customer is wrong about a certain situation."
 - "Brian : I'm looking for a certain crown."
 - "The other day I updated my PalPay account, or I thought I did, but then I read this article on the john this morning, and I'm like 87% certain that I have a virus, and..."
 - "- Never deactivate the firewall we have installed for you, even if it prevents you from accessing certain websites (which are, as it happens, not appropriate for the workplace)."
 - "Susie : Hmmm. I wasn't certain what he was saying, but it sure was strange."
 - "With just a few minor tweaks and several hundred billable hours, we are fairly certain that the Delavigne Corporation can restore its reputation at least for a few months - that's the Slick Brand Solutions guarantee*."
 - "I'm writing to inform you of certain changes to the structure of the company which will be effected very soon."
 - "I'll leave you a certain amount of leeway in the negotiations, though please use the following figures as a guide"
 - "You're certain this is the address your son gave you, Horatio?"
 
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