The phrase 'most countries use' is correct and usable in written English.
You can use it to indicate the widespread usage of something. For example, "Most countries use the metric system for measurements."
Currently, most countries use various standard experimental tests, which lead to different experimental values for these limits.
Today police in most countries use such systems, called automated fingerprint identification systems (AFIS), to search rapidly through millions of digitized fingerprint records.
While most countries use only the international style of shooting, U.S. shooters use dozens of different styles: long-range, short-range, pistol, shotgun and others.
Pigs: Farrowing crates are used in the UK for a few weeks after piglets are born, something which hugely reduces young mortality; most countries use significantly smaller sow pens and the animals are kept in them most of the year.
The change is not expected to prompt a major exodus, because most countries use entrance visas to control the number of visiting Cubans, and international travel remains way beyond the means of most islanders, who earn state salaries of about $20 per month.
Generally, most countries use a combination of these sorts of policies in their disability strategies.
Most countries used the same antibiotic for adults and children, with an adjusted dosage for children.
16– 21 Malaysia, like most countries, uses a passive surveillance system to capture the incidence of dengue illness.
We found that most countries used ad hoc priority-setting and planning methods, with little to no underlying systematic risk analysis.
Most countries used non-standardised methods, with different sample sizes and convenience sampling to establish their prevalence at the start of the programme.
While most countries used a ten-day quarantine period, based on early estimates of the incubation period [ 33], our findings suggest that a longer period may be appropriate if SARS were to reemerge [ 29].
