试用视觉搜索
使用图片进行搜索,而不限于文本
你提供的照片可能用于改善必应图片处理服务。
隐私策略
|
使用条款
在此处拖动一张或多张图像或
浏览
在此处放置图像
或
粘贴图像或 URL
拍照
单击示例图片试一试
了解更多
要使用可视化搜索,请在浏览器中启用相机
English
搜索
图片
灵感
创建
集合
视频
地图
资讯
购物
更多
航班
旅游
酒店
房地产
笔记本
自动播放所有 GIF
在这里更改自动播放及其他图像设置
自动播放所有 GIF
拨动开关以打开
自动播放 GIF
图片尺寸
全部
小
中
大
特大
至少... *
自定义宽度
x
自定义高度
像素
请为宽度和高度输入一个数字
颜色
全部
彩色
黑白
类型
全部
照片
插图
素描
动画 GIF
透明
版式
全部
方形
横版
竖版
人物
全部
脸部特写
半身像
日期
全部
过去 24 小时
过去一周
过去一个月
去年
授权
全部
所有创作共用
公共领域
免费分享和使用
在商业上免费分享和使用
免费修改、分享和使用
在商业上免费修改、分享和使用
详细了解
重置
安全搜索:
中等
严格
中等(默认)
关闭
筛选器
609×122
Organic Chemistry
Phosphonate synthesis by substitution or phosphonylation
1050×662
semanticscholar.org
Table 1 from Direct Synthesis of Phosphonates and α-Amino-phosphonates f…
768×1024
scribd.com
New Synthesis and Reactions of Phos…
489×419
ResearchGate
Synthesis of the phosphonates 5a–5j. | Download Scientific Di…
695×1005
researchgate.net
Common uses and synthesis …
320×320
researchgate.net
Synthesis of (a-aminoalkyl)phos…
2552×688
chemistry-europe.onlinelibrary.wiley.com
Synthesis of Phosphonates with Identical and Different Alkyl Groups by the Micro…
850×1202
researchgate.net
(PDF) Direct Synthesis of P…
850×890
researchgate.net
Scheme 6. Synthesis of ph…
405×92
Organic Chemistry
Amino phosphonate synthesis by phosphonylation
581×102
Organic Chemistry
Phosphonate synthesis by substitution or phosphonylation
432×101
Organic Chemistry
Amino phosphonate synthesis by phosphonylation
517×88
Organic Chemistry
Phosphonate synthesis by substitution or phosphonylation
610×73
Organic Chemistry
Amino phosphonate synthesis by phosphonylation
809×782
frontiersin.org
Frontiers | Hydroxy- and Amino-Phosphonates and -Bisphosphonat…
1200×628
pubs.acs.org
Valinophos Reveals a New Route in Microbial Phosphonate Biosynthesis That Is Broadly Conserve…
477×102
Organic Chemistry
Amino phosphonate synthesis by phosphonylation
850×747
researchgate.net
Structure formulae of phosphonates. | Down…
564×131
Stack Exchange
organic chemistry - Does the synthesis of beta-keto phosphonates from esters have …
535×322
Frontiers
Frontiers | H-Phosphonate Chemistry in the Synthesis of Electrically Neutral and Charg…
2320×1808
chemistry-europe.onlinelibrary.wiley.com
Synthesis of Phosphonates with Identical and Differen…
916×284
semanticscholar.org
Figure 1 from STUDY OF PHOSPHATE AND PHOSPHONATES AS AN INTRIGUING S…
850×233
researchgate.net
Preferred conformations of the phosphonates described in this study | Download Scientifi…
3336×1999
MDPI
Molecules | Free Full-Text | Direct Synthesis of Phosphonates and α-A…
1741×878
pubs.rsc.org
Solution-phase synthesis of oligodeoxyribonucleotides using the H -phosphonate method with N ...
320×320
researchgate.net
Scheme 1. Synthesis of phosphonates and α-aminopho…
1201×618
mdpi.com
Molecules | Free Full-Text | One-Pot Synthesis of Phosphinylphosphonate Derivatives and Their ...
610×76
Organic Chemistry
Phosphonate synthesis by substitution or phosphonylation
780×1024
researchgate.net
Possible phosphoryl tra…
1327×849
degruyter.com
Phosphonate reagents and building blocks in the synthesis of bioactive compounds, n…
663×385
ResearchGate
Scheme 1 Synthesis of a series of a-hydroxyphosphonates (1-22). | Downl…
611×1078
researchgate.net
Scheme 1. Synthesis of the …
850×398
researchgate.net
Reaction of synthesis of compound contains four phosphonate groups | Download Scientific Diagram
833×1514
Royal Society of Chemistry
Synthesis of α-brominated phos…
627×275
researchgate.net
Figure1. Reaction of synthesis of compound contains one phosphonate group | Download Scientific ...
某些结果已被隐藏,因为你可能无法访问这些结果。
显示无法访问的结果
报告不当内容
请选择下列任一选项。
无关
低俗内容
成人
儿童性侵犯
Invisible focusable element for fixing accessibility issue
反馈