Angewandte Chemie CSL style

Hello, first time Zotero user here, bit baffled that the template on the official website as follows:
((Reference 1, Example for Journals:)) a) A. Author, B. Coauthor, ChemSusChem 2008, 1, 1-10; b) A. Author, B. Coauthor, Angew. Chem. 2006, 118, 1-5; Angew. Chem. Int. Ed. 2006, 45, 1-5.
But, Zetreo Angewandte Chemie CSL style used in Word like that :
[1] H. Kroemer, Rev. Mod. Phys. 2001, 73, 783–793.
[2] K. T. Butler, G. Sai Gautam, P. Canepa, Npj Comput. Mater. 2018, 5, 19.
Which wouldn't merge many refers to one entry.
How to solve it? THX!!
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