a slow [quick] study せりふの覚えが遅い[早い]役者. - 研究社 新英和中辞典
The following characteristics are made evident through the study of other months, in addition to November: (A) The production level of specific electronic parts rapidly deteriorated in October 2011,when the inundation of industrial estates started and the recovery of the production is still slow ( 50%compared with the same month a year ago, even as of March 2012); (B) The production of transportation machinery deteriorated more rapidly in October 2011 than the production of HDDs or electric products, but its production rapidly recovered recently*61 (as of March 2012, the production of the overall transportation machinery recovered to +14.7% compared with the same month a year ago, while that of HDDs and electric products showed 9.9% and 7.9%, respectively). (C) The level of production of some items, such as televisions and textile products (hereinafter referred to as "items subject to product adjustment"), was originally low due to the product cycles and other factors that are not directly associated with the floods. The magnitude of decline of these items was large compared with the same month a year ago. 昨年11 月以外の月についても確認すると、①工業団地への浸水が始まった昨年10 月になって急速に特定電子部品の生産水準が悪化し、直近でも生産水準の回復が遅れている(今年3 月でも未だに前年同月比▲50%台)こと、②輸送用機械の方がHDD や電気製品よりも昨年10 月に突然急速に悪化し、直近では急速に生産を回復している*61(今年3 月の生産が、HDDは前年同月比▲ 9.9%・電気製品▲ 7.9%に対し、輸送用機械全体では同+14.7%まで回復)こと、③テレビや繊維製品等幾つかの品目(以下、生産調整品目という。)では、生産循環など洪水とは直接関係のない要因で既に洪水前から生産水準が低く、前年同月比のマイナス幅が大きかったことが特徴として確認できる。 - 経済産業省