strain

strain, stress, pressure, tension

这些名词均有“压力，重压，紧张”之意。
strain: 指某人为克服外力界压力而造成的身心和情绪等方面的压抑。用于物时，指任何力或合力作用于一个物体上面造成的应变。
stress: 侧重指承受外来的压力，也指由于某种原因而引起的心理、生理或情绪上的紧张。
pressure: 在科学上，指单位面积上所受到的压力。用于引申时，指某事物所产生的压力或影响力等。
tension: 多指因关系不好或其它原因而出现的紧张状态，也指某物被过度伸展的程度或状态。

名词 strain:

1. (physics) deformation of a physical body under the action of applied forces
2. difficulty that causes worry or emotional tension- R.J.Samuelson
   同义词：stress
3. a succession of notes forming a distinctive sequence
   同义词：tune, melody, air, melodic line, line, melodic phrase
4. (psychology) nervousness resulting from mental stress
   同义词：mental strain, nervous strain
5. a special variety of domesticated animals within a species
   同义词：breed, stock
6. (biology) a group of organisms within a species that differ in trivial ways from similar groups
   同义词：form, variant, var.
7. a lineage or race of people
   同义词：breed
8. injury to a muscle (often caused by overuse); results in swelling and pain
9. the general meaning or substance of an utterance
   同义词：tenor
10. an effortful attempt to attain a goal
    同义词：striving, nisus, pains
11. an intense or violent exertion
    同义词：straining
12. the act of singing
    同义词：song

动词 strain:

1. to exert much effort or energy
   同义词：strive, reach
2. test the limits of
   同义词：try, stress
3. use to the utmost; exert vigorously or to full capacity
   同义词：extend
4. separate by passing through a sieve or other straining device to separate out coarser elements
   同义词：sift, sieve
5. cause to be tense and uneasy or nervous or anxious
   同义词：tense, tense up
6. become stretched or tense or taught
   同义词：tense
7. remove by passing through a filter
   同义词：filter, filtrate, separate out, filter out
8. rub through a strainer or process in an electric blender
   同义词：puree
9. alter the shape of (something) by stress
   同义词：deform, distort

1. He was breaking up under the strain.
   他劳累过度，身体逐渐衰弱。
2. The rope broke under the strain.
   绳索在张力之下断了。
3. You will strain your eyes by reading in such poor light.
   你在这样弱的光线下看书会损伤视力的。
4. This strain of wheat can grow during a cold spring.
   这种小麦可以在寒冷的春天生长。
5. The author seems to strain after novelty.
   作者似乎在力图标新立异。
6. Too heavy a load will strain the rope to its breaking point.
   负载过重会把绳子拉紧到崩断的地步。