在各种规定的培养基上可得到锈菌的单体纯净培养物.The axenic culture of rusts has been achieved on various defined media.这为霉菌的生长提供良好的培养基.It provides a good medium for growth of molds.马铃薯对许多细菌是一种良好的培养基.The potato is a good nutrient medium for many...
Frank was carrying out fuel-system tests which necessitated turning the booster pumps off.弗兰克在做燃料系统测试，这一测试需要关掉升压泵。A prolonged drought had necessitated the introduction of water rationing.由于持续干旱，用水需要实行配给了。The word " neces...
He will be competing in the London-Calais-London race.他将参加伦敦至加来的航海往返赛。We were all ready for the attack at the Pas de Calais.我们在加来海峡一带严阵以待.He will be competing in the London-Calais-London race...他将参加伦敦至加来的航海往返赛。Ferry comp...