The engineer sketched a diagram showing how the hydraulic system transfers pressure to the brake mechanism.
工程师画了一张示意图，展示液压系统如何将压力传递到制动机构。
The technical manual's first section explains the tool's basic assembly using simple diagrams, while later sections, aimed at more experienced users, describe advanced calibration techniques without any accompanying illustrations.
From a Text Structure and Purpose question · Craft and Structure
Which choice best defines “diagram”?
B — A drawing showing how something works. “diagram” means a drawing showing how something works.
Which word means “a drawing showing how something works”?
B — diagram. “diagram” means a drawing showing how something works.
diagram — a drawing showing how something works. In Chinese: 图表，示意图.
diagram is pronounced /ˈdaɪəɡræm/.
The engineer sketched a diagram showing how the hydraulic system transfers pressure to the brake mechanism. (工程师画了一张示意图，展示液压系统如何将压力传递到制动机构。)
schematic, chart, graph — all close in meaning to diagram (a drawing showing how something works).
Yes. diagram is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
dia(through)+gram(drawing)