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Using 'During' & 'While'
source: Learn English with Papa Teach Me 2012年5月7日 The difference between 'During' & 'While', and how to correctly use them. www.papateachme.com Twitter: @papateachme Facebook: www.facebook.com/papateachmeenglish Phrasal Verbs Tumblr: www.papateachme.tumblr.com