10000单词 200节 or&nbsp;20000单词 500节 送外教teacher口语10节一对一，需要单词或口语teacher一对一可联系&nbsp; c7799o<img data-key="0" src="http://imagev2.xmcdn.com/storages/9701-audiofreehighqps/1A/20/GKwRIJEHTyGUAAJHjwHPusdR.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/storages/9701-audiofreehighqps/1A/20/GKwRIJEHTyGUAAJHjwHPusdR.jpg?op_type=0" data-large="http://imagev2.xmcdn.com/storages/9701-audiofreehighqps/1A/20/GKwRIJEHTyGUAAJHjwHPusdR.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-large-width="750" data-large-height="428.57142857142856" data-preview="http://imagev2.xmcdn.com/storages/9701-audiofreehighqps/1A/20/GKwRIJEHTyGUAAJHjwHPusdR.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_small" data-preview-width="140" data-preview-height="80"> <img data-key="1" src="http://imagev2.xmcdn.com/storages/fb7b-audiofreehighqps/0C/9B/GKwRIRwHTyGgAAIjfgHPusyC.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/storages/fb7b-audiofreehighqps/0C/9B/GKwRIRwHTyGgAAIjfgHPusyC.jpg?op_type=0" data-large="http://imagev2.xmcdn.com/storages/fb7b-audiofreehighqps/0C/9B/GKwRIRwHTyGgAAIjfgHPusyC.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-large-width="750" data-large-height="428.57142857142856" data-preview="http://imagev2.xmcdn.com/storages/fb7b-audiofreehighqps/0C/9B/GKwRIRwHTyGgAAIjfgHPusyC.jpg!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_small" data-preview-width="140" data-preview-height="80">

subtract v.减去 单词trac 容易写成drac

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