他低头以避开低垂的树枝。

He ___lowered his head to avoid the low-hanging branch.

他轻轻地把画框往下移了一点。

He carefully ___lowered the picture frame a little bit.

为了节约能源，政府建议人们在晚上调低暖气温度。

To save energy, the government suggested people ___lower their heating at night.

那次失误降低了他的职业声望。

The mistake ___lowered his professional standing.