Most planet-formation models predict a “planet desert” within one astronomical unit (or the average distance from the Earth to the sun) of a host star.
大多数行星形成模型预言在主恒星一个天文单位（或从地球到太阳的平均距离）以内会有一个“沙漠之星”。
2
During formation of the dikaryotic haustorium there were collars formed around the neckand tubles in cytoplasm in host cell.
在双核吸器形成过程中，寄主细胞可分泌胼胝质和产生与侵染有关的管状结构。
3
After sacrifice, spinal cord sections were histologically analyzed for presence of graft-derived immune cells, host immune response, tissue sparing, glial scar formation, and grafting efficacy.