Complex sentence: So, in diode OR logic gates, the input voltage sources are connected to diode anodes; diode cathodes are joined to the output (Node 1 in the figure), which is connected through the pull-down resistor R1 to ground.
Split into simpler sentences: So, in diode OR logic gates, the input voltage sources are connected to diode "anodes". Diode cathodes are joined to the output (node 1 in the figure), which is connected through the pull-down resistor R1 to ground.