双叶的

Only dicotyledonous flowering woody plants and most gymnosperms have true twigs; monocotyledons and tree ferns do not.

只有双子叶的木本开花植物和大部分的裸子植物才有真正的小枝，而单子叶植物和树蕨类植物则没有。

Cereals and grasses are generally resistant, while dicotyledonous plants are often very susceptible.

具有狭长直立叶子的单子叶植物对它具有普遍的抗性，而有些双子叶的植物则对它敏感。

Thereby, it generalizes portfolio frontier curve from hyperbola to hyperboloid of two sheets. When there exists risk securities, it generalizes frontier from straight line to cone. Meanwhile it gives some corresponding conclusions.

从而把原模型中没有无风险证券时的前沿证券曲线从双曲线推广到双叶双曲面，把有无风险证券时的前沿证券曲线从直线推广到圆锥面，同时还得到了一系列相应结论。

Laccase could degrade the conjugated resin acids and unsaturated fatty acids in model emulsions to some extend in the presence of ABTS2,2\'-azinobis(3-ethylbenzthiazoline-6-sulfonate or VIO.Palustric acid and abietic acid in DCS of Masson pine CTMP could be partially removed by lacaase treatment without addition of external mediator.

漆酶在ABTS2，2-连氮-二(3-乙基苯并噻唑-6-磺酸或紫尿酸存在的条件下可以降解带有共轭双键的树脂酸和不饱和脂肪酸；在不加介体的情况下漆酶处理可以除去马尾松CTMP的DCS样品中的部分长叶松酸和枞酸。

Type and sole genus of the Clethraceae; deciduous shrubs or small trees: white_alder, summer-sweet.

桤叶树属的模式单属；双子叶的灌木或乔木。

Methods:Lower abdominal flaps were formed by using iliolumbar flaps with the superficial iliac and superficial epigastric blood vessels as the pedicles. They were co－pedicled and bilobate flaps, which were cut thin to form subcutaneous vascular net flaps with axis blood vessels. The flaps were used to repair complete dismantled injuries of two fingers.

在下腹部形成以旋髂浅血管为蒂的髂腰部皮瓣及以腹壁浅血管为蒂的下腹部皮瓣，二皮瓣共蒂形成双叶皮瓣，同时将其修薄，形成有轴心血管的真皮下血管网皮瓣，修复两指完全脱套伤。

Author has carried on experiment research and flow-field analysis to the large-two blade impeller and basic four kinds of glass-lined impellers in China,has investigated impeller type,rotational speed,materials,etc.

对大双叶片式搅拌器及国内4种搪玻璃搅拌器进行了实验研究及流场数值模拟，考察了桨型、转速、物料对各种搅拌器搅拌功率和混合时间的影响。

He spent five years in a secret study of a small two-leaf helicopter.

他用了5年时间，一直在秘密研究一种小型的双叶直升机。

The R OBINSON R 66 T URBINE is a five-place helicopter that incorporates many of the design features of its reputable predecessor, the R44, including a two-bladed rotor system, T-bar cyclic and an open interior cabin configuration.

罗宾逊R66涡轮直升机是一种5座型的直升机，整合了罗宾逊直升机家族中著名的前任R44型，其中包括双叶型转轮系统，丁字架循环和开放的客舱配置设计等众多功能。

Two-blade small diameter directional control rotor at the rear end of fuselage frame.

双叶转子直径小的方向控制框架在机身尾部。

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。