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Two kilos of potatoes and two packets of salts Two kilos of potatoes and two packet of salt Two kiloes of potatos and two packets of salt Two kilos of potatoes and two packets of salt
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Two-third, are Two-thirds, are Two-third, is Two-thirds, is
构建基因表达载体的目的就是使目的基因能够在受体细胞中表达和发挥作用 双子叶植物体受到损伤时，伤口细胞会分泌大量的酚类化合物吸引农杆菌 含有某种生物全部基因的许多DNA片断称为基因组文库 用E.coliDNA连接酶可将Smal限制酶切割时产生的末端连接起来
or two and two even two of two
Two kilos of tomatoes and two packets of' salts Two kilos of tomatoes and two packet of salt Two kiloes of tomatos and two packets of salt Two kilos of tomatoes and two packets of salt
a two-thousand-words article two two-thousand-words article a two-thousand-word article two two-thousand-words articles
two hundred；two fifth two hundreds；two fifth two hundred；two fifths two hundreds；two fifths
two crankshaft revolutions in a two-stroke/cycle engine two power strokes in a two-stroke/cycle engine one power stroke in a two-stroke/cycle engine two piston strokes in a two-stroke/cycle engine
图1所示的质粒分子经Sma l切割后，含2个游离的磷酸基团 对图中质粒进行改造，插入的Smal酶切位点越多，质粒的热稳定性越高 用图中的质粒和外源DNA构建重组质粒，可使用Smal切割 构建重组质粒时，要使用DNA连接酶。
two-weeks holiday two weeks' holidays two- week holiday two-weeks' holiday
two weeks：is two—week；is two—week；are two weeks’；are
two past two fifty-eight past one two to one two to two
two desks two another two more more two
two day’s；two day’s time；15-year-old two-day；two day’s time；15 years old two-day；two days’ time；15-year-old two days；two-day time；15-years-old
two third, are two thirds, are two thirds, is two third, is
class two Class Two Two Class two class
two-hundred-word two-hundreds-word two-hundreds-words two-hundred-words
Two kilos of potatoes and two packets of salts Two kilos of potatoes and two packet of salt Two kiloes of potatos and two packets of salt Two kilos of potatoes and two packets of salt
two-hundred-word two-hundreds-word two-hundreds-words two-hundred-words
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