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月四級真題（第一套）閱讀 Section C
柯林斯高階英漢雙解學(xué)習(xí)詞典釋義
COMB in ADJ
(與形容詞構(gòu)成復(fù)合詞)表示“具有…音調(diào)(或色調(diào))”
-toned combines with adjectives to indicate that something has a particular kind of tone.