Cottonwood Populus spp

用法例句

Studies on the Height Growth Rhythm of Cutting Plant of Cottonwood Populus spp.;

三角叶杨扦插苗苗高的生长规律研究

Some Varieties of "Yanghui triangle";

“杨辉三角”的几种变体

Recurrence formulas of transformation between Chebyshev polynomial and generic polynomial are abtained, and calculation method of Chebyshev polynomial coefficient analogy Yanghui triangle and transformation method between chebyshev polynomial and generic polynomial are also obtained.

给出了Chebyshev多项式与幂函数互化的系数计算递推公式 ,并由此得到了类似杨辉三角的系数计算和Chebyshev多项式与一般多项式的互化算法 ,进一步得到了多项式精简的算法 。

Taking advantage of the combination of the numbers and their shapes,this article introduces the relationship of some special arrays with the pyramid numbers and the Yanghui Triangle.

利用数形结合结合,介绍了金字塔、杨辉三角形与一些特殊数列之间的关系。

Any of several North American poplar trees, especially Populus deltoides, which has triangular leaves and a tuft of cottony hairs on the seeds.

三角叶杨，棉白杨北美洲的一种杨树，尤指普通白杨有三角形叶片、种子上有束棉絮状绒毛

Any of various deciduous trees such as the tulip tree, basswood, or cottonwood.

白木树如美国鹅掌揪、椴、三角叶杨等各种落叶树

He picks a place with plenty of food he likes--the inner bark of aspens, willows, poplars, cottonwoods, or birches.

它所选的筑巢地还应有大量它所喜爱的食物----山杨、柳、白杨、三角叶杨或桦树的内皮。

Determination of Chrysin-7-glucoside in Leaf of Nalussieboldji with HPLC

HPLC法测定三叶海棠叶中白杨素苷含量

An Interview with Professor Yang Wuneng;

三叶一芽 三位一体——杨武能教授访谈录

Study on the establishment of regeneration of triploids of Chinese white poplar

三倍体毛白杨叶片再生体系建立研究

Female Gametogenesis and Polyploidy Induction of Populus Adenlpoda Mazim

响叶杨雌配子发生及三倍体诱导研究

Leaf nutrient diagnosis of triploid Populus tomentosa with DRIS

三倍体毛白杨叶片营养DRIS诊断

The Properties of Two Types of Determinants in Yang Hui s Triangle;

杨辉三角中两类行列式的性质及计算

On Yang Hui s Triangle and its Application;

“杨辉三角”行列式的定义、性质及其应用

Biological Characteristics and Larvae Secretion Analysis of Stauronematus Compressicornis

杨扁角叶蜂生物学特性及幼虫分泌物的研究

Pest risk analysis and management of Stauronematus compressicornis (Fabricius)

杨直角叶蜂在河南的危害与风险性管理

Leaf Nutrient Characteristic and Fertilizer Effect of Triploid Populus Tomentosa;

三倍体毛白杨叶片营养特性及施肥效应的研究

Development and Application of Graphics Information Triploid Populus Tomentosa

三倍体毛白杨叶片营养与林地养分动态研究

GC-MS ANALYSIS OF VOLATILE COMPONENTS FROM LEAVES OF DIFFERENT MYRICA RUBRA

GC-MS联用分析三个品种杨梅树叶的挥发油组分

On Conjectures of Two Deformations of Pascal s Triangle;

关于杨辉三角错位变体和克隆变体的猜想

Storage Quality Improvement of Myrica Rubra Fruits Through Coating With Antistaling Agent Consisting of Syzygium aromaticum (L.),Artemisiae argy (Levl.et Vant.) Extract and Locust Bean Gum

丁香、艾叶提取物与长角豆胶复合涂膜保鲜剂对杨梅耐藏性的影响

On Learning by Analogy in Teaching Advanced Mathematics from the Promotion of Yang Hui's Triangle

从杨辉三角形的推广谈高等数学教学中的举一反三