The phrase "a train of four" is correct and usable in written English.
It can be used in contexts where you are referring to a sequence or series of four items, often in a technical or descriptive manner.
Example: "The experiment involved a train of four connected cars that were used to measure the effects of weight distribution."
Alternatives: "a series of four" or "a sequence of four".
A train of four camels and four walkers will leave the city of Salalah on Oman's southern coast and trek through present-day Saudi Arabia, moving from desert well to desert well and sleeping in the open.
McBride also plans to implement a novel pulse scheme, developed by SLAC accelerator physicists for LCLS, in which each "shot" of the X-ray laser contains a train of four X-ray pulses instead of just one, opening up new ways of filming materials as shock waves pass through them.
After sugammadex injection, a train of four ratio higher than 0.9 is obtained in less than 5 minutes in all the patients whatever the degree of muscle paralysis at the time of reversal and even when anesthesia is maintained with halogenated agents.
P102 Evaluation of a neuromuscular blockade with benzylisoquinoliniums: a comparison of a train of four with a clinical assessment.
Residual neuromuscular block was antagonized with sugammadex (2 mg/kg) after confirming a train of four counts of two.
Introduction Despite few studies, a monitoring of a neuromuscular blockade with a train of four (TOF) is recommended in intensive care unit (ICU) (1).
The simulated process involves a train of eight continuous stirred-tank reactors operating at 10 °C.
A train of twelve closed freight cars left on the evening of February 22nd, packed with six hundred and fifty people.
There is a train of ten de-luxe carriages waiting in the yards with steam up, and who's in one of them but the girl?
You need the prayer more than anyone else right now".' The runaway engine had been part of a train of three locomotives, one disabled, that arrived in the Fresh Pond railyard Wednesday afternoon, Mr. Dobranetski said.
This bias scheme comprises a train of five SET/RESET voltage pulses of 6 V/1 μs SET and −6 V/1 μs RESET and the full sequence is cycled eight times.
