杂合性

Trees, shrubs, or sometimes shrublets, monopodial or sympodial, usually dioecious, less often monoecious or polygamo- dioecious.

乔木，灌木，或有时小灌木，单轴或合轴分枝，通常雌雄异株，少数常为雌雄同株或杂性异株。

Flowers yellowish to greenish, rarely brightly colored, small, bisexual or unisexual, rarely polygamous,(4 or)5-merous, hypogynous to epigynous, in mostly axillary, sessile or pedunculate cymes, or reduced to few in fascicles. Calyx tube patelliform or hemispherical to tubular, sometimes absent, at rim with calyx, corolla, and stamens; sepals 4 or 5, valvate in bud, triangular, erect or ± recurved during anthesis, adaxially often distinctly keeled, alternate with petals.

对带绿色淡黄的花，很少明亮染色，单性，很少杂性的小，两性或，(4或)5瓣，萼筒小盘状或者半球形到管状，有时无，在凸缘有花萼，花冠和雄蕊；萼片4或5，芽期镊合状，三角形，直立或者在花期弯曲，正面通常显著凸起，与花瓣互生。

Macrocycle with two pyridyl unitsZ-protected groups in the di-ester formed from esterification of Z-Glycine with 2,6-bishydroxymethyl pyridine was removed and thenconverted into Ts-protected group.

本论文以天然氨基酸为手性源，以芳杂环为大环分子的刚性因素，研究它们的环合反应和分子结构，为此设计了下列三种结构类型的大环分子：一。

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。