Influence of truncating manner on production , partitioning of dry substance and yield in tomato .

整枝方式对番茄干物质生产、分配及产量的影响。

W + opens for reading and writing , truncating the file but also allowing you to read back what 's been written to the file w.

打开阅读和写作，截断文件，但也让你回读什么被写入文件。