Question

usefulness             use·ful·ness              /        ˈjuːsfəlnəs                ;          NAmE                ˈjuːsfəlnəs                /                              noun                            [uncountable        ]                    the fact of being useful or possible to use        有用；实用；可用性                    ◆      There are doubts about the usefulness of these tests.      这些试验是否有用，人们有所保留。              ◆      The building has outlived its usefulness.      这座楼房已超过使用年限了。                  use·ful·ness              /        ˈjuːsfəlnəs                ;          NAmE                ˈjuːsfəlnəs                /             usefulness[ˈju:sfəlnəs]n10118171868992811401130NOUN1099345500Spoken:17321624有用(67%)，有用性(33%)n.有用；有效性；有益

Accepted Answer

t66Pk8i74cE7fib4MrIjF7xko6EITrHfnRv9pP3GRzZKRZN7m98Adsa3A0FU/b6Yv9Z+3lIC+WngeKhXlCOOoJO39uT0KdCKDNYROMJ58AmaMwUc/JTfMuBR/Rc7HRlP/O4yiEec6aysyfqgTB+6TCBjUX9i991vvzrqSHpKrfM+ZNvGWtTVW0r8SM4K2RvRrXtaB6EwUt+VKk2zCAUH0jTa9y+isRPK5tGNR2smQno= usefulnessuse‧ful‧ness /ˈjuːsfəlnəs/ ●○○ noun [uncountable]  Examples Thesaurus Collocations Phrases Word family  the state of being useful or the degree to which something is usefulusefulness of There are doubts as to the usefulness of this approach  (=it may not be useful). As a commuter service, the ferry has outlived its usefulness  (=is no longer useful).

word	usefulness
content	t66Pk8i74cE7fib4MrIjF7xko6EITrHfnRv9pP3GRzZKRZN7m98Adsa3A0FU/b6Yv9Z+3lIC+WngeKhXlCOOoJO39uT0KdCKDNYROMJ58AmaMwUc/JTfMuBR/Rc7HRlP/O4yiEec6aysyfqgTB+6TCBjUX9i991vvzrqSHpKrfM+ZNvGWtTVW0r8SM4K2RvRrXtaB6EwUt+VKk2zCAUH0jTa9y+isRPK5tGNR2smQno=
Oxford	use·ful·ness / ˈjuːsfəlnəs ; NAmE ˈjuːsfəlnəs / noun [uncountable ] the fact of being useful or possible to use 有用；实用；可用性 ◆ There are doubts about the usefulness of these tests. 这些试验是否有用，人们有所保留。 ◆ The building has outlived its usefulness. 这座楼房已超过使用年限了。 use·ful·ness / ˈjuːsfəlnəs ; NAmE ˈjuːsfəlnəs /
LDC	usefulnessuse‧ful‧ness /ˈjuːsfəlnəs/ ●○○ noun [uncountable] Examples Thesaurus Collocations Phrases Word family the state of being useful or the degree to which something is usefulusefulness of There are doubts as to the usefulness of this approach (=it may not be useful). As a commuter service, the ferry has outlived its usefulness (=is no longer useful).
WDF	usefulness [ˈju:sfəlnəs] n10118 1718 68 99 281 140 1130 NOUN10993 45500 Spoken: 17321624 有用(67%)，有用性(33%) n.有用；有效性；有益