vt.

1. 拉紧；拖紧；伸张
   The heavy box strained the rope to a breaking point.

   那只沉重的箱子几乎把绳子拉断。

2. 尽力睁大（眼）；竭力喊[O2]
   She strained her eyes in the darkness.

   她在黑暗中睁大眼睛看。

3. 使过劳（以致受损伤）；扭伤
   John strained his eyes by reading too much small print.

   约翰因看过多的小字体而弄坏了眼睛。

4. 滥用；曲解，歪曲
   The official was warned not to strain his power.

   那个官员受到警告，不可滥用职权。

5. 过滤
6. 紧抱[（+to）]
7. 超越……之所及

vi.

1. 尽力，使劲[（+at/after/under）][+to-v]
   He strained to finish the work in a week.

   他拼命努力，想在一周内完成工作。

   They strained to row the boat.

   他们奋力划船。

2. 紧拉；紧拖[（+at）]
   He strained at the rope and the boat moved.

   他拉紧缆绳，船随着动了。

3. 不肯接受，以为不可[（+at）]
4. 扭歪；弯曲；（因用力而）变形
5. 被过滤；渗出
6. 紧靠[（+against）]

n.

1. 拉紧；张力[C][U]
   The rope broke under the strain.

   绳子被拉断了。

2. 负担，沉重压力[U][C]
3. （身心的）紧张状态；过劳，操心[C][U]
4. （身体的）失常；扭伤[C][U]
   The athlete is suffering from muscular strain.

   这名运动员正受肌肉劳损之苦。

n.

1. （人的）血缘，世系；种，族[C]
   She is of a noble strain.

   她出身名门。

2. （动植物的）种，品种[C]
   This strain of wheat can grow during a cold spring.

   这种品系的小麦能在寒冷的春天生长。

3. 气质，（性格上的）倾向[U][S1][（+of）]
4. 曲子，旋律，歌；诗节，歌节[P]
5. 口吻，语气；笔调；情调[C]
   He wrote letters in a happy strain.

   他用欢快的笔调写信。

v.

1. force (a part of one's body or oneself) to make an unusually great effort.
   ▸injure (a limb, muscle, or organ) by overexertion.
   ▸make a strenuous and continuous effort.
2. make severe or excessive demands on.
3. pull or push forcibly at something.
4. pour (a mainly liquid substance) through a sieve or similar device to separate out any solid matter.
   ▸drain off (liquid) in this way.

n.

1. a force tending to strain something to an extreme degree.
   ▸Physics  the magnitude of a deformation, equal to the change in the dimension of a deformed object divided by its original dimension.
2. an injury caused by straining a muscle, limb, etc.
3. a severe demand on strength or resources.
   ▸a state of tension or exhaustion resulting from this.
4. (usu. strains) the sound of a piece of music.

n.

1. a distinct breed, stock, or variety of an animal, plant, or other organism.
2. a tendency in a person's character.