"I walk straight ahead from there" 是表达 "从那里我向前直走" 的一种可能的英文表达方式。
"from there"表示"从那里"，"straight"表示"直走"，"ahead"表示"向前"。组合在一起，就形成了上面的表达方式。
举个例子：
"I'll meet you at the park. From there, I'll walk straight ahead to the museum." (我会在公园里见你，从那里我会直走去博物馆。)
"I got lost in the mall. From there, I walked straight ahead until I found the exit." (我在商场里迷路了，从那里直走直到找到出口。)