Whenever we need to use one of the variables, you pop back into PHP mode and issue an echo statement to write the variable's value directly into the Web page text.
当需要使用某个变量时，就退回php模式，并发出一条echo语句将该变量的值直接写入网页正文中。
You can go into and out of PHP mode as necessary (to issue echo statements that output variables into the Web page as I've done above, for example).
您可以根据需要(例如，如我在上面所做的那样，发出echo语句以将变量输出到网页中)进入或退出php模式。
Materials and Methods:40 patients were studied using FLAIR sequence and conventional spin echo(SE). The mode of presentation of the lesions were compared.
材料与方法：对40例脑部受检查者分别使用FLAIR序列及常规自旋回波（SE）序列进行对比分析。
Compared to common imaging mode, this mode increases SNR of ocean echo by decreasing the bandwidth, then accuracy of fixed position can be improved.
和普通成像模式相比，该模式通过降低带宽的方式来提高回波的信噪比，从而提高了定位精度。
Then the echo data simulating methods for this mode are introduced and the corresponding imaging algorithms are discussed as well.
介绍了该工作方式下回 波数据的模拟方法，并讨论了几种适合该工作方式的成像算法。
Methods E-Echo was performed in 44 patients with pacemakers. All patients underwent supine bicycle exercise tests in fixed-rate and adaptive pacing mode.
方法对4 4例植入频率适应性起搏器的患者行运动负荷超声检查，分别于非频率适应和频率适应两种起搏状态时进行仰卧位踏车实验。
The following M—mode echocardiographic manifestations were noticed: 1. There appeared a fluttering and anteriorly moving lineal echo in the aortic lumen during systole;
其M型超声心动图表现为：1。主动脉腔内舒张期可见一条扑动的线性回声；
The following M—mode echocardiographic manifestations were noticed: 1. There appeared a fluttering and anteriorly moving lineal echo in the aortic lumen during systole;
其M型超声心动图表现为：1。主动脉腔内舒张期可见一条扑动的线性回声；
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