I. black·en [ˈblækən] 动词 trans
I. by [baɪ] 介词
1. by (beside):
2. by (part of sb/sth):
3. by (past and beyond):
4. by (not later than):
5. by (during):
6. by (happening progressively):
7. by (agent):
8. by (cause):
9. by (with -ing):
10. by (method):
11. by (means of transport):
12. by (parent):
14. by (name of a person):
15. by (according to):
16. by (quantity):
17. by (margin):
19. by 数学:
II. by [baɪ] 副 不变的
1. by (past):
短语，惯用语:
blackened by soot
| I | blacken |
|---|---|
| you | blacken |
| he/she/it | blackens |
| we | blacken |
| you | blacken |
| they | blacken |
| I | blackened |
|---|---|
| you | blackened |
| he/she/it | blackened |
| we | blackened |
| you | blackened |
| they | blackened |
| I | have | blackened |
|---|---|---|
| you | have | blackened |
| he/she/it | has | blackened |
| we | have | blackened |
| you | have | blackened |
| they | have | blackened |
| I | had | blackened |
|---|---|---|
| you | had | blackened |
| he/she/it | had | blackened |
| we | had | blackened |
| you | had | blackened |
| they | had | blackened |
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单语范例（未经PONS编辑处理）
First, the soot is dissolved in appropriate organic solvents.
en.wikipedia.org Soot obtained from burning the heartwood supplied a pigment for traditional tattooing (t moko).
en.wikipedia.org Over a period of time, these tiles become dark to black from constant exposure to soot and smoke.
en.wikipedia.org Besides, addition of many fire-retardants produces soot and carbon monoxide during combustion.
en.wikipedia.org The soot in kohl helped in reducing the damaging effects of sun glare on their eyes.
en.wikipedia.org