For beginners, this might be a good free e-book, hoping to be useful for you.
对初学者来说,或许这是一本不错的免费电子书,希望能对你有用。
In the coming weeks, I'll be releasing a very short (maybe 15 pages or so), free e-book.
接下来的一个星期,我准备发表一篇非常短(15页左右)的免费电子书。
You enter your email address to download a free e-book... but you're also subscribing to weekly email updates.
你输入你的邮箱地址,以便下载免费的电子书…但是你也将订阅每周邮件更新。
应用推荐