I would guess that modern humans, with no natural predators but themselves, and with all their toys and mental constructs and cosy rooms, are relatively easy to creep up on.

我不妨猜想，现代人除了自身之外并没有其他天然的掠夺者，还拥有一切玩具、精神构建和舒适房间，相对而言容易麻痹大意，受到偷袭。