dxdy Last time I told you if we have dx dy we could switch it to r dr d theta.
上一次课提到，如果给出,我们可以把它转换为rdrdθ
In this command, the -r switch tells GNU Wget to recursively follow all links found on that page, so the tool will crawl the entire site.
在这个命令中，- r开关告诉GNUWget递归地跟踪那个页面上的所有链接，所以该工具将抓取整个站点。
You can execute an action in the Compare mode (see Figure 5) by specifying the -r command line switch.
您可以指定- r命令行开关来在Compare模式下执行一项操作(见于图5)。
We used the -r switch to select the appropriate version tag.
我们使用-r开关选择适当的版本标记。
The optional -r switch will delete the user's home directory and all its contents in addition to the user.
使用可选的 -r开关可以将用户的主目录及所有相关信息全部删除。
To rebuild a file system, use the -r switch.
要重建一个文件系统，可使用-r 命令行开关。
The f switch tells the command to automatically fix errors and the r switch locates bad sectors and recovers readable data.
f开关告诉命令去自动修理错误，r开关则定位坏的扇区并恢复可读数据。
Ruifeng specializes in ultra precision, SMD, ultra small, ultra-thin, multifunctional, waterproof type switch, socket R & D and manufacturing.
瑞丰专业致力于超精密、贴片式、超小、超薄、多功能、防水式开关、插座的研发与制造。
Meet or over MIL-R-83725 standard. If used as load switch, please contact GTVAC.
符合或超过MIL-R-83725标准。负载开关应用，请向工厂咨询。
Production R & D self-locking key switch;
生产研发自锁按键开关；
Ruifeng switch products factory is an enterprise of Electronic Science and technology R & D, production and sales as one of the.
瑞丰开关制品厂是一家集研发、生产及销售为一体的电子科技企业。
Has developed the antenna switch, which is used in T-R separate antenna system, also put forward the scheme of designing the switch for T-R community antenna system.
收发分离天线体制下，天线开关的设计与实现，并提出了收发共用天线体制下高频天线开关的设计方案。
Isolation of the T/R switch must be considered when the high power transmitter is connected to the low power radio frequency unit by T/R switch as the radar antennas are reciprocal.
雷达天线往往收发共用，通过收发开关连接高功率发射单元和低功率射频单元要考虑收发开关的隔离度问题。
Isolation of the T/R switch must be considered when the high power transmitter is connected to the low power radio frequency unit by T/R switch as the radar antennas are reciprocal.
雷达天线往往收发共用，通过收发开关连接高功率发射单元和低功率射频单元要考虑收发开关的隔离度问题。
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