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strain
/stɹeɪ̯n/
The dominant image is one of tension—a physical or psychological stretching to the absolute limit. It suggests a state where something is barely holding together or is being pushed just beyond its capacity, often implying an imminent risk of breaking or injury. In a biological context, it shifts from 'tension' to 'lineage,' describing a specific branch of a species. Here, it refers to the subtle differences that make one version of a virus or bacteria distinct from another. When used for liquids, the meaning is purely mechanical: forcing a substance through a barrier to separate components. This usage lacks the emotional or physical stress associated with the other meanings.
Uncountable when referring to the general pressure or tension on a structure or relationship ('The marriage was under severe strain'). Countable when referring to specific biological varieties of bacteria or viruses ('A deadly new strain of flu emerged').
意味
To force something to make an unusually great effort or to stretch a muscle beyond its limits.
"He managed to strain his back while lifting the heavy crate."
To pass a liquid through a sieve or filter to remove solid particles.
"Strain the pasta using a colander before serving."
To make a great effort to do something, often in a way that causes tension.
"She had to strain to hear the whisper over the noise of the crowd."
A force tending to pull or stretch something to an extreme or damaging degree.
"The heavy load put a great deal of strain on the suspension bridge."
A genetic variant, subtype, or selective breed of a microorganism.
"Scientists have identified a new strain of the influenza virus."