We are hunting for new, dangerous types of virus or trying at least to limit them.

我们正在寻找新的、危险的病毒类型，或者至少试图限制它们的生成。

The textual field became fluid and malleable, a potentially infinite expanse, or at least limited only by the computer's ever-expanding memory.

文本场变得流动且可塑，具有无限大的潜在扩展， 或者至少仅受计算机不断扩展的内存的限制。