In the past, falling oil prices have given a boost to the world economy, but recent forecasts for global growth have been toned down, even as oil prices sink lower and lower.
2016年12月四级真题(第一套)阅读 Section C
柯林斯高阶英汉双解学习词典释义
COMB in ADJ
(与形容词构成复合词)表示“具有…音调(或色调)”
-toned combines with adjectives to indicate that something has a particular kind of tone.