(If using a thermometer to measure the temperature, students should wait until the thermometer registers room temperature again before proceeding with this step.)
(students; should wait; T:until the thermometer registers room temperature again before proceeding with this step) (the thermometer; registers; room temperature; T:again; T:before proceeding with this step)
students the thermometer
should wait registers
T:until the thermometer registers room temperature again before proceeding with this step
room temperature T:again T:before proceeding with this step