请教四个英语句子一：killingasmallbutsignificantnumberofcellsdirectly.其中significantnumberof怎么翻译呢?二：Agriculturalresearchhasdevelopedmuchfasteronplantsthananimals.Andthereisinsufficientreasontoexpect

　　请教四个英语句子

　　一：killingasmallbutsignificantnumberofcellsdirectly.

　　其中significantnumberof怎么翻译呢?

　　二：Agriculturalresearchhasdevelopedmuchfasteronplantsthananimals.Andthereisinsufficientreasontoexpectthatifspeciespatentsonplantsareupheld,thepracticeofgrantingsuchpatentswillberestrictedtothem.Itseemsfromdevelopmentssofarthattheblitzkriegisinchingitswaytohigherlifeforms.

　　其中blitzkrieg原意是闪电战,这里指什么?

　　三：Broadlywordedpatentrights(asinthecaseofcottonorsoybean),orthetakingoutofalargenumberofpatentseffectivelysuppresscompetitionthroughthethreatofinfringementsuits.

　　takingoutof如何翻译?

　　四：Utilitypatentsalsoprohibitfarmersfromthecommonpracticeofsavingandusingseedsfrompreviouscropsorfrombreedinganimals,aswellasrestrictingresearchexemptions.

　　restricting往上接哪个from?