中科环保：暂时未在SAF领域有相关技术研究成果

Use 在＋location＋表示 to say where someone expressed an opinion or fact; it frames the source of a statement and is common in news or reporting.

Use 暂时未 before a verb to describe something that has not happened yet but might occur later; it softens the negation by stressing temporariness.

Attach 后 to a verb or clause to show that one action happens after another; it’s the standard way to describe chronological order.

Letting or making someone do something uses 让＋person＋verb; it expresses causation or permission.

Use 哪些＋noun (or verb phrase) to ask “which ones” when there are multiple options; it’s a flexible interrogative for both nouns and fields.