УБЕЖДАТЬСЯ В ТОМ, ЧТО

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The scientistmust assure himself thatthe errors are stated on a reasonable basis.

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Check thatthe liquid is of the correct specific gravity.

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Fuel injectors should be (carefully) testedto determine thatthey are functioning properly.

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Ensure thatthe mains supply is switched off.

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Make(orBe)sure thatthe voltage selector is set correctly.

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See(to it)thatthe face against which the leather fits is quite clean.

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In orderto make certain thata parent tree will produce offspring with ...

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Thus Keplersatisfied himself thatthe orbit was oval.

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By recalculating vu²we were ableto verify(orascertain)thatthe approach of this section is consistent with ...

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To convince yourself thatthis is correct, use appropriate unity factors.