not talking about D/G,but dD/dG。
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Your "$6 of debt" is D--not "dD"
-career-
♂
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01/07/2019 postreply
10:36:35
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"你说工作效率低,我指出工作量不会减少,你现在又换到经济效益……你多久没见识过变化了,鸡同鸭讲"
-career-
♂
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01/07/2019 postreply
12:16:47