是經驗, 雖然印像中 dmg 沒有給容易/困難的調整值.
记得有根据等级的简单中等困难
基本的遭遇等级对应经验见DMG 57页表。
遭遇等级比团队等级低1到2级的遭遇为简单的遭遇
遭遇等级和团队等级相等或高1级为普通的遭遇
遭遇等级比团队等级高2到4级的遭遇为困难的遭遇
见DMG 56页：
Choose an encounter level. Encounter level is relative
to the number of characters in the party.
An easy encounter is one or two levels lower
than the party’s level.
A standard encounter is of the party’s level, or
one level higher.
A hard encounter is two to four levels higher
than the party’s level.
应用5人的遭遇组合模板（DMG 58页起）进行搭配时，
若团队人数为3-4人，则难度调高一个等级（即普通难度的5人模板对3-4人的小队而言是困难难度的）
若团队人数为6-7人，则难度调低一个等级（即普通难度的5人模板对6-7人的小队而言是简单难度的）。
原文见DMG 58页：
If you have three or four players, you can also use
the easy encounters as standard encounters and the
standard encounters as hard encounters. Likewise, if
you have six or seven players, use the standard encounters
as easy encounters and the hard encounters as
standard ones.
