慢速英语:在地球仅需20分钟 太空烤饼干要2小时

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aboard – adv. on something

raw – adj. not cooked

dough – n. a mixture of flour and liquid used to make foods that are then baked

figure out – v. to decide something after thinking about it

definitely – adv. without any doubt

tray – n. a flat object used for holding or carrying things

certainly – adv. without a doubt