饱经沧桑: having lived through many changes...
遇: to meet, to encounter, to treat, to receive, opportunity, chance...
少年: early youth, youngster, (literary) youth, young man...
特地: specially, for a special purpose...
马上: at once, right away, immediately, on horseback (i.e. by military force)...
断断续续: intermittent, off and on, discontinuous, stop-go, stammering, disjointed, inarticulate...
爱心: compassion, kindness, care for others, love, charity (bazaar, golf day etc), heart (the symbol ?)...
洗衣机: washer, washing machine...
疫苗: vaccine...
密度: density, thickness...