| Teaching firefighters solely through traditional means is a laborsome and costly process, tedious for both trainers and firefighters. |
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| Experimental approaches to identification of sumoylation sites may not be effective due to the dynamic nature of sumoylation, laborsome experiments and their cost. |
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| If the genetic architecture of a trait under consideration is unknown, it is hard to choose a proper WGP approach without a serial of laborsome model comparisons. |
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| He won in his season debut, though it was laborsome at times. |
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