Can you explain the phenomenon _______ water expands when it is frozen?空里填什么词合适?

Can you explain the phenomenon _______ water expands when it is frozen?空里填什么词合适?
Can you explain the phenomenon _______ water expands when it is frozen?空里填什么词合适?

Can you explain the phenomenon _______ water expands when it is frozen?空里填什么词合适?
Can you explain the phenomenon ___that____ water expands when it is frozen?
你能解释水在结冰时的膨胀现象吗?
that引导定语从句,先行词phenomenon