I. strengthen [ˈstreŋθən] 动词 trans
II. strengthen [ˈstreŋθən] 动词 不及物动词
| I | strengthen |
|---|---|
| you | strengthen |
| he/she/it | strengthens |
| we | strengthen |
| you | strengthen |
| they | strengthen |
| I | strengthened |
|---|---|
| you | strengthened |
| he/she/it | strengthened |
| we | strengthened |
| you | strengthened |
| they | strengthened |
| I | have | strengthened |
|---|---|---|
| you | have | strengthened |
| he/she/it | has | strengthened |
| we | have | strengthened |
| you | have | strengthened |
| they | have | strengthened |
| I | had | strengthened |
|---|---|---|
| you | had | strengthened |
| he/she/it | had | strengthened |
| we | had | strengthened |
| you | had | strengthened |
| they | had | strengthened |
单语范例（未经PONS编辑处理）
The bindi is said to retain energy and strengthen concentration.
en.wikipedia.org A dark color, for example, forms a high contrast to the bright light spots and strengthens the effect.
en.wikipedia.org The provincial councils and moves to strengthen them were not popular.
en.wikipedia.org They were built around 1840, although strengthening work in the 1930s makes them appear newer.
en.wikipedia.org It started to attract global clients who helped develop and strengthen its network.
en.wikipedia.org