【入门夯实】时间戳单位：秒与毫秒的换算事故

local last = tonumber(getplayvar(actor, 0, "LastUse")) or 0
local now = os.time()
if now - last < 5000 then
    sendmsg(actor, 1, "烈火剑法冷却中。")
    return
end

local COOLDOWN = 5
local last = tonumber(getplayvar(actor, 0, "LastUse")) or 0
local now = os.time()
if now - last < COOLDOWN then
    sendmsg(actor, 1, "冷却剩余 " .. (COOLDOWN - (now - last)) .. " 秒。")
    return
end
setplayvar(actor, 0, "LastUse", now, 1)

local waitSec = 5
local waitMs = waitSec * 1000
print(waitSec, waitMs)