然而几个世纪以前，兰花还是稀有珍贵之物，如今在许多家庭和办公室里都可以见到。
While considered rare and valuable some centuries ago, they may be seen today in many homes and offices.
Church回忆第一次见到了质粒和基因序列的情形-青霉素酶和胰岛素，阻遏物和干扰素。
Church recalls seeing plasmid and gene sequences for the first time-penicillinase and insulin, the lac repressor and interferon.
我不信关于见到不明飞行物的各种报道。
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