Pay heed to the word ‘experimental’ before attempting.

不过安装之前可要注意了，这可是个 试验性 的。

Take heed of/pay heed to what I say, if you want to succeed.

如果你要想成功，就得注意我所说的话。

For the first time he had to pay heed to his appearance.

这是他第一次非得注意自己的外表不可了。

That new world is another reason to pay heed to these writers.

那个新的世界是令我们关注这些作家的另一个原因。

So pay heed to old Aesop's sage counsel, I pray--and keep your distance.

看伊索语言里的鼠尾草律师，我祈祷，注意你们两者之间的距离。