① In almost every photo from our 1986 family vacation to Washington, D.C., I am showing off the souvenir I picked out from the gift shop at the Smithsonian’s National Zoo—a white, oversize, cotton sweatshirt with puff-paint pandas dancing on the front. I was nine years old. Not even midsummer heat could deter me from keeping that sweatshirt on throughout the trip. ① 在1986年我们全家前往华盛顿特区度假的时候，每张照片里，我都在炫耀我从史密森尼国家动物园的礼品店挑选的纪念品，一件白色、超大号纯棉卫衣，这件卫衣的胸前印有发泡立体印花的跳舞熊猫。我当时九岁。即使是仲夏的酷暑，也无法阻止我在整个旅行过程中一直穿着这件卫衣。 ②I remember very little from the vacation, aside from the thrill of being at the zoo and seeing the giant pandas, Ling-Ling and Hsing-Hsing—star attractions on the tourist circuit. The following year Ling-Ling gave birth to twin cubs. The babies didn’t survive, but I don’t remember learning that as a kid. ② 这个假期发生的事儿，我都忘的差不多了，除了在动物园里看...