无底的

The protein had the specificity on substrate recognition, which could decompose 3,4-dihydroxybenzoic acid to catechol but not 2,4-dihydroxy- benzoic acid to resorcin. The ligand at C-3 site of benzene ring had no effect on enzyme activity.

蛋白质还具有底物识别的特异性，能够催化3，4-二羟基苯甲酸转化为邻苯二酚，而不能催化2，4-二羟基苯甲酸转化为间苯二酚，这表明苯环上3'位的配基对酶活无影响。

A good deep bowl flaring slightly towards the brown dressed rim. The interior is undecorated. The blue painted exterior is incised all over in 'sgraffito' style with spiral decoration.

品相完好的深口碗，碗口棕色釉，里无纹饰，外宝石蓝色地上饰满"苏格拉费蒂"风格的螺旋状纹饰，碗底是青花乾隆款。

Comparison with nonspinning case shows spinning changes the flow structure and base flow of projectile with lateral jets.

与无旋转情况对比表明，旋转对弹丸侧喷流以及底部流动均有影响，高速旋转导致侧喷射流向旋转来流方向倾斜，并减弱其对弹底流动的引射。

Bottom-dweller of warm western Atlantic coastal waters having a flattened scaleless body that crawls about on fleshy pectoral and pelvic fins.

大西洋西部温暖水域的底栖鱼，身体扁平无鳞，靠胸鳍和腹鳍爬泳。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分，分别以脱氢松香酸和脱氢松香酸甲酯为底物，乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂，无水三氯化铝作催化剂，采用不同的溶剂及反应条件进行傅克酰基化反应，得到3个新化合物。

They are fully covered thin-skinned lining, copper stave ,carbon-ceramic cup bottom and hearth,closed loop soft water cooling system,PW serial type bell-less top with two coaxial vertical hoppers,improved top-fired stove and all-dry bag dusting etc,all of which establish the basis for the B.

莱钢1000m 3高炉设计采用全覆盖、砖壁合一薄壁炉衬、铜冷却壁、碳砖-陶瓷杯复合炉底、软水密闭循环冷却系统、PW串罐无料钟炉顶、改进型顶燃式热风炉、全干法布袋除尘等一系列先进实用技术，为实现&高产、优质、低耗、长寿、环保&的生产目标奠定了技术基础。

They are fully covered thin-skinned lining, copper stave, carbon-ceramic cup bottom and hearth, closed loop soft water cooling system, PW serial type bell-less top with two coaxial vertical hoppers, improved top-fired stove and all-dry bag dusting etc, all of which establish the basis for the B.F.

莱钢1000m3高炉设计采用全覆盖、砖壁合一薄壁炉衬、铜冷却壁、碳砖-陶瓷杯复合炉底、软水密闭循环冷却系统、PW串罐无料钟炉顶、改进型顶燃式热风炉、全干法布袋除尘等一系列先进实用技术，为实现&高产、优质、低耗、长寿、环保&的生产目标奠定了技术基础。

Some of the commonly specified coatings include epoxies, coal tar derivatives and sacrificial zinc primers.

通常采用的涂层包括：环氧树脂，煤焦油衍生物和无锌底漆。

However, this time he goes to a high-class international school and investigates an ammo-smuggling case instead. Added with the complicated love relationships with Athena Chu and Sharla Cheung, both the scenario and slapsticks in the movie make this sequel never a setback of the first one.

周星驰由普通中学当卧底晋级到贵族国际学校、案情由失枪案变成恐怖组织偷运军火案，加上与朱茵和张敏的三角爱情线，无论於剧情及笑料方面也比上集丰富，跟上集相比可谓有过之而无不及。

In a round-bottomed 2 L flask equipped with a magnetic stirrer and placed under an inert atmosphere, there was added 750 mL anhydrous THF, containing 30 g LAH.

将磁力搅拌器放入一个2L的圆底烧瓶，放置在惰性气体环境下。加入750ml无水THF，包括30gLHA。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。