I. reef [ri:f] 名词
bar·ri·er [ˈbæriəʳ, 美 ˈberiɚ] 名词
1. barrier:
| I | reef |
|---|---|
| you | reef |
| he/she/it | reefs |
| we | reef |
| you | reef |
| they | reef |
| I | reefed |
|---|---|
| you | reefed |
| he/she/it | reefed |
| we | reefed |
| you | reefed |
| they | reefed |
| I | have | reefed |
|---|---|---|
| you | have | reefed |
| he/she/it | has | reefed |
| we | have | reefed |
| you | have | reefed |
| they | have | reefed |
| I | had | reefed |
|---|---|---|
| you | had | reefed |
| he/she/it | had | reefed |
| we | had | reefed |
| you | had | reefed |
| they | had | reefed |
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单语范例（未经PONS编辑处理）
It consists of a 6-mile (10 km) wide nearly circular barrier reef surrounding a shallow lagoon and several sand islets.
en.wikipedia.org A barrier reef forms a calcareous barrier around an island resulting in a lagoon between the shore and the reef.
en.wikipedia.org The barrier reef encircling this lagoon is narrow and has four passages through it west of the island.
en.wikipedia.org It consists of a ring-shaped barrier reef and several sand islets.
en.wikipedia.org It formed the world's largest barrier reef, 3001,000 m (9803,300 ft) from shore, stretching for 2,000 km (1,200 mi).
en.wikipedia.org