(大的，不确定的)量(indefinite but large quantity， amount， extent or degree) [U， a～][N(of)];

a great/good deal (of) 大量，许多：a great (good)～of money/time/work/trouble/pain/information/support/help/praise 大量的钱/时间/工作/麻烦/痛苦/信息/支持/帮助/表扬;learn/hear/write a great(good)～(用作名词)学会/听说/写很多(东西);change/travel/cost a great (good)～(用作副词)改变很大/经常旅行/花费很多;be a great (good)～better/happier/more difficult (用作副词)好/快活/困难得多;

【说明】a great/good deal of后仅可接不可数名词。注意下句中不可数名词和可数名词前表示数量的短语的使用：A good deal of money is spent by a large number of people in buying a great deal of beef obtained from a large number of cattle.(许多人花许多钱买许多的牛肉，这些牛肉是宰了许多的牛而得来的。)