Growers and purveyors are debating which strains of yuzu in California have the most authentic appearance and aroma.
To prevent overinflation, which strains the seams and can cause leaks, Aero pumps are designed to stop at maximum inflation.
First came suggestions from France, which strains to qualify as either regional or near-regional.
A few months before flu season, they have to guess which strains will be dominant.
They then experience a moment of frustration, which strains the relationship and expresses itself in an almost sacramental buddy-movie moment: the fist fight.
Identifying which bacteria are critical and which are bystanders, which strains affect which behaviors, by which pathways, in whom and when, is a formidable task.
Or in the words of the poet Tony Harrison's jazzed-up new translation, which strains in aspiring to hipness: "There's your humanity.
So the new guidelines suggest that doctors check with their state health departments to see which strains are most common locally and treat for them.
Experts were also trying to determine exactly which strains were used in each case and how they were blended with other material.
Each year, experts try to guess which strains found anywhere in the world are apt to circulate in this country in the next flu season.
It all rolls along amiably enough, regularly breaking out a twisty little revelation which strains credulity without ever quite breaking it.
