四尖的

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

Stamens 6, tetradynamous; filaments not dilated at base; anthers oblong, apiculate at apex.

雄蕊6，四强雄蕊；花丝而不是膨大的在基部；花药长圆形，具细尖的在先端。

Stamens 6, tetradynamous; filaments dilated at base; anthers oblong or linear, apiculate at apex.

雄蕊6，四强雄蕊；花丝膨大的在基部；花药长圆形或线形，具细尖的在先端。

Stamens 6, tetradynamous; filaments wingless or uni- or bilaterally winged, appendaged or not, toothed or toothless; anthers ovate or oblong, apiculate or not at apex.

雄蕊6，四强雄蕊；两侧具翅的花丝无翅或一或，附属物与否，无牙的齿或；花药卵形或长圆形，具细尖的或并非在先端。

Fruiting pedicels erect or ascending; ultimate leaf veins not ending in apiculate callosities; fruit lanceolate, ovoid, or oblong, not torulose, often subappressed to rachis, slightly 4-angled

果梗直立或上升；末级的叶脉不结果是具细尖的胼胝体；披针形，卵球形，或长圆形，不近念珠状的果，通常近贴伏于轴，四棱形的稍 4 E。

As when some mighty wave that thunders on the beach when the west wind has lashed it into fury- it has reared its head afar and now comes crashing down on the shore; it bows its arching crest high over the jagged rocks and spews its salt foam in all directions- even so did the serried phalanxes of the Danaans march steadfastly to battle.

正如巨浪击打涛声震响的海滩，西风卷起峰尖，一浪接着一浪地冲刷，先在海面上扬起水头，然后飞泻下来，冲荡着滩沿，声如滚雷，水波拱卷，对着突兀的岩壁击撞，迸射出四溅的浪花，达奈人的队伍，一队接着一队，蜂拥而至，开赴战场；各位首领统带着自己的

It will promote the progress of hole making thechique and accelerate the automatization course of the tool production in our country. In addition, the author analyzes a drill grinding unit on a machining center and present a new grinding model for grinding four-plane facet drill points, which will be a new way of drill grinder design.

此外，作者还分析了一台加工中心上的钻头刃磨装置，提出了一种两轴合成四平面钻尖的刃磨理论，并对其应用前景进行了初步探讨，为钻头刃磨方法和刃磨机的研制开辟了一条新的途径。

The Statue of Liberty wears the ancient Greek style clothes, while a crowns of millions of rays on head, which has seven sharp tip awns,the symbol of seven continents and four oceans on the earth.

自由女神穿着古希腊风格的服装，头戴光芒四射的冠冕，有象征世界七大洲及四大洋的七道尖芒。

Comparing as BA, 0.1mg·L〓 TDZ was more effective in inducing germinating and developing of buds, regenerating prolific caespitose buds via organogenesis, promoting rhizogenesis and activity of root system greatly, as a result, acclimation survival rate was improved significantly. When leaf segments, cut from in vitro plantlets, were placed on MS media containing 0.1mg·L〓 TDZ, adventitious buds regenerated from segments. After transferred to propagated and rooted media, adventitious buds would proliferate and come into full plantlets.

与BA相比，TDZ的细胞分裂素活性至少高出一个数量级，0.1mg·L〓的TDZ能有效地诱导四个基因型芋茎尖的萌动、生长、大量增殖丛生芽，促进试管苗根系发生，将根系活力提高2倍以上，显著提高了试管苗的驯化成活率；浓度为0.01mg·L〓的TDZ能诱导魁芋类型的芋离体叶片切块产生再生芽点，转接后可增殖不定芽并形成再生植株。

Beneath those rugged elms, that yew-tree's shade, Where heaves the turf in many a mouldering heap, Each in his narrow cell for ever laid, The rude Forefathers of the hamlet sleep.

香气四溢的晨风轻松的呼召，燕子从茅草棚子里吐出的呢喃，公鸡的尖喇叭，使山鸣谷应的猎号再不能唤醒他们在地下的长眠。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。