• “…investigation of three trimeric aluminum(III)-water species: …”

→ “…investigate the three trimeric aluminum(III)-water species: …”

EXPLANATION: limited/exact number = “the”; unlimited = not necessary

说明：可数名词之前需要用“the”；不可数名词不一定必需

• “…properties of triangular Al₃ structure are…”

→ “…the properties of the triangular Al₃ structure are…”

EXPLANATION: 1) with “X of X”, “the” is required in most cases. 2) “the” is used with things already mentioned in the text (Al₃)

说明：1、使用“X of X”形式， “the” 多数情况下是必须的2、“the” 用于指文中已经提及的事情，比如Al3

• “…according to “Core-link” model or “Cage-like” Keggin-Al₁₃ model.”

→ “…according to the “Core-link” model or the “Cage-like” Keggin-Al₁₃ model.”

EXPLANATION: use “the” in front of the names of unique models/methods, etc.

说明：在特定的方程式、方法等的名称之前用“the”

_未完待续

理文编辑预存得赠礼活动进行中

收获永远比预存多

100万元的赠送金额和礼品等你拿