free vector 中文意思是什麼
free vector
解釋
自由矢-
We constructed a binary vector carrying a modified human afgf gene and a mana gene that allows the use of pmi selection system, an antibiotic and herbicide - free system, during the transformation procedure
我們構建的雙元表達載體帶有一個經過改構的人類酸性成纖維細胞生長因子基因（ afgf ） ，載體上的選擇標記基因為mana ，它使得轉化過程中可以使用pmi這種不含抗生素及除草劑的選擇系統。 -
The system employs the free activex graphics control of autocad, whip, and its special vector drawing file format of dwf, to publish the 2d engineering drawings to the web
本系統採用autocad的免費activex圖形瀏覽控制項whip ! ，以其專用的dwf矢量文件格式，實現了二維工程圖的網路發布。 -
On the other hand, the electric field and intensity distributions of the he11 mode in the hollow fiber are calculated by using the exact solutions of maxwell equations based on the vector model, and the diffracted near - and far - field distributions of the he11 - mode output beam under the fresnel approximation are studies. we derive an analytical expression on the far - field distribution of the he n - mode output beam in free space and discuss its applicable condition. we also analyze and compare the differences between the he11 - and lp01 - mode output beams, and find that the near - field distribution of the lpoi - mode output beam is a gaussian - like one, but the near - field distribution of the he11 - mode output beam is a doughnut - like one, whereas the far - field distribution of both the lp01 - and he11 - mode output beams are a doughnut one
此外，我們把中空光纖中lp _ （ 01 ）模（標量模型）和he _ （ 11 ）模（矢量模型）的場分佈以及它們各自的輸出光束的近場與遠場分佈進行了比較，發現兩種模式的輸出光束在近場分佈有很大的區別， lp _ （ 01 ）模輸出光束在近場是一個高斯分佈，而he _ （ 11 ）模輸出光束在近場是一個中空光束，在遠場兩種模式的輸出光束分佈是基本一致的，這正是由於在中空光纖中採用了弱波導近似以後所引起的誤差。 -
The recombinant plasmids pbmb121l, pbmb9821l and pbmb986l were constructed after transferring bacillus thuringiensis icps gene crylaal, crylaclo and crylca from their original plasmid vectors to different plasmid vector. the relevant recombinant strains were obtained after introducing the 3 recombinant plasmids into bacillus thuringiensis plasmid - free mutant strain 8mb 171 by electroporation. the transformation and expression properties of 8mb 171 were studied
通過將蘇雲金芽胞桿菌殺蟲晶體蛋白基因cry1aal 、 cry1ac10和cry1ca轉移至不同質粒載體上，分別構建了重組質粒pbmb121l 、 pbmb9821l和pbmb986l ，並分別導入無質粒突變株bmb171 ，篩選得到攜帶相應icps基因的重組菌株。 -
Surveillance forms a vital part of our operations at the fehd, not just in the important task of preventing vector - borne diseases, but in helping to ensure the food we eat is safe and free from contamination
監察行動是本署工作的主要一環，不但對預防媒傳疾病至為重要，亦有助確保食物安全和不受污染。
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