V-ERG
拉开（拉链）
When you unzip something which is fastened by a zip or when it unzips, you open it by pulling open the zip.
例句
James unzipped his bag...
詹姆斯把自己包上的拉链拉开。
This padded changing bag unzips to form a convenient and comfortable mat for nappy changing.
这种加厚型妈咪袋把拉链打开就是一块方便、舒适的垫子，可给宝宝换尿布。