The effects of three metal ions on the cultured tissue from mantle and epipodial tentacle of Haliotis discus hannai with Ca~(2+),Mg~(2+) and Zn~(2+) ions which are added into the M199 and RPMI-1640 medium are studied respectively.
采用3因素3水平L9(34)的正交设计,以组织块增殖百分率作为评价指标,研究了在M199和RPMI-1640培养基中分别添加Ca2+,Mg2+,Zn2+金属离子对鲍的外套膜和上足触手组织培养的影响。
The Composing Technique of Debussy′s Prelude "Footprints in the Snow";
德彪西钢琴前奏曲《雪上足迹》的写作技法
The swivel had been oiled to perfection.
旋轴已经上足了油。
FIFA will severely punish all cheating acts in the football field
国际足联将严惩足球场上的欺骗行为
During match with football, sportsman is like tangling on the football field.
足球比赛时，运动员似在足球场上混战。
soccer shoes: Soccer shoes may have studs or cleats across the sole.
足球鞋：足球鞋底上有圆形或条形钉柱。
contemptibly small in amount.
在数量上不足称道的少。
mentally nimble and resourceful.
思想上敏捷、足智多谋。
A political featherweight.
政治上无足轻重的人
flaws in the aBove interpretation.
上述解释的不足之处
There is a football match on the playground.
操场上有一场足球比赛。
obstruct a player on the football field
在足球场上阻挡球员
Fans spilled onto the playing field.
足迷们纷纷涌上赛场
Used to indicate deficiency in performance:
表明行动上的不足、欠缺。
a precarious footing on the ladder.
梯子上不稳定的立足点。
We came up with a party of hikers
我们赶上了一队远足者。
Pump the tires up hard before going out on the road.
上路前给轮胎打足气。
He was obsessed with football from a very young age.
他从小就迷恋上了足球。
We traced the footsteps in the snow.
我们跟踪雪地上的足迹。
The tide has obliterated the footprints on the sand.
潮水湮没了沙上的足迹。