桦木

An inflorescence consisting of a dense spike or raceme of apetalous, unisexual flowers, as in Salicaceae and Betulaceae; an ament.

柔荑花序 Catkin 由无被单性花组成的密集的穗状或总状花序，如杨柳科和桦木科。

One is the effect of LT crack of wood on wood transverse bending property. Birch, ash tree, walnut are studied, and it appears that under the bending loads the bending strength of the beam with crack will decrease, but not obviously .

第一部分研究了木材LT型裂纹对木材横纹理弯曲性能的影响，在对桦木、水曲柳、核桃楸的研究中，发现含LT型裂纹的横梁在弯曲载荷的作用下，其弯曲性能会有一定程度的下降，但降幅并不明显。

The tree species have greater impact on primary physical and mechanical property of LVL beams, Birch LVL beams have better property than basswood LVL beams.

其主要物理力学性能受树种的影响较大，桦木LVL梁的主要性能均优于椴木LVL梁。

Mechanical properties including the density MOR, MOE, shearing strength of birch and basswood LVL beams made by the bi-frequency hot press were tested by universal strength testing machine. The primary failure modes were discussed when LVL beams suffered the flexural and level shearing load.

在万能力学试验机上测试由高频热压方法制造的桦木和椴木单板层积梁的密度、静曲强度、弹性模量和水平剪切强度等力学性质；讨论LVL梁受弯曲、水平剪切载荷时的主要破坏形式并得出相关结论。

Alder trees belong to the birch family.

赤杨属于桦木科。n。藻类，海藻

But I was a birch tree, I was a lizard.

我曾是桦木，曾是蜥蜴

He used a piece of birch to make a small boat.

他用一块桦木做一只小船。

Objective To assay the carcinogencity of water and organic extracts of birch wood dust.

目的 检测桦木尘水提取液和有机提取液的致癌性。

Soft soled moccasins became essential for kneeling in birchbark canoes, and for walking with rigid snowshoes.

软底马克辛鞋在划桦木独木舟和套上僵硬的雪鞋时就成了必要的了。

Professional Hearing Services has opened in the Birchwood Medical Center to evaluate, fit, and dispense hearing aids .

专业听力服务已开放的桦木医学中心评估，适当，并免除助听器。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。