I. chain [tʃeın] 名词
| I | chain |
|---|---|
| you | chain |
| he/she/it | chains |
| we | chain |
| you | chain |
| they | chain |
| I | chained |
|---|---|
| you | chained |
| he/she/it | chained |
| we | chained |
| you | chained |
| they | chained |
| I | have | chained |
|---|---|---|
| you | have | chained |
| he/she/it | has | chained |
| we | have | chained |
| you | have | chained |
| they | have | chained |
| I | had | chained |
|---|---|---|
| you | had | chained |
| he/she/it | had | chained |
| we | had | chained |
| you | had | chained |
| they | had | chained |
单语范例（未经PONS编辑处理）
A key participant in the food chain, it is an important predator of many small rodents, rabbits, and birds.
en.wikipedia.org It was an apex predator (meaning that it was at the top of its food chain), preying upon abundant ceratopsids and hadrosaurs.
en.wikipedia.org Gar are a main predator in the aquatic food chain in lakes and rivers.
en.wikipedia.org Man was no longer at the top of the food chain.
en.wikipedia.org Species on the food chain can amass body concentrations of mercury up to ten times higher than the species they consume.
en.wikipedia.org