Example sentences of "[vb -s] itself by " in BNC.

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1 The thorny devil ( above ) relies simply on its immensely sharp and powerful spikes for protection , while the bearded lizard ( left ) defends itself by erecting its spiny throat skin .
2 Since expansion takes place laterally on exposure to moisture , there must be a resulting contraction longitudinally , which manifests itself by rotation of the coil to unwind , with of course , expansion on drying .
3 A secondary stage follows after a few more months and manifests itself by a rash on the face and body .
4 A group which perpetuates itself by endogamous sexual reproduction usually has some perception of ethnic identity .
5 Recruitment to its ranks is highly selective in terms of social and educational status , and it perpetuates itself by spending parts of its accumulated surpluses on privileged education , often abroad , for its favoured sons ( and occasionally daughters ) .
6 The system funds itself by operating on the Royal Bank of Canada 's over-the-counter exchange rates which are not as fine as those obtained by the institution itself .
7 The porcupine fish ( opposite , top ) inflates itself by gulping in water ( or air if it has been removed from the sea ) until its body is so puffed up that its spiny scales stand out rigidly from its body and defy any killer to devour it .
8 It inwardly destroys itself by concentrating on efficiency and on building a convenient systematic way of life which largely ignores the humans it caters for .
9 The echidna , Australia 's spiny anteater , protects itself by digging rapidly downwards until its soft underside is completely hidden and its enemy is offered only a sea of powerful , sharp spikes .
10 This is inflammation and infection of the breast which sometimes follows cracked nipples and shows itself by pain , redness of a part or the whole breast , swelling , and fever .
11 Is it just because everyone else does , because she is the kind of person that people ask to parties , because her name inscribes itself by automatic writing on guest lists ?
12 The curriculum justifies itself by saying that unless teachers deliberately introduce the subject of homosexuality to the classroom it would be unlikely ever to arise among the children themselves .
13 The ‘ Bantustan effect ’ is a system by which a developed and dominating core area surrounds itself by poor and backward ‘ sovereign ’ states .
14 Figure 7.6 A territorial rufous humming-bird weighs itself by perching on a spring balance .
15 The political anger of ‘ On Civil Disobedience ’ and ‘ Walden ’ has burned itself out ; only one remark still rings with it , when Thoreau considers how the cherry disperses itself by having its stones swallowed : ‘ It is only princes who can afford to have their cherry puddings stoned , and so make their lives more completely luxurious and useless . ’
16 I have grown it myself for the last twelve years , in a small colony in a north-facing border which maintains itself by self-sown seedlings .
17 An age defines itself by choosing another age — usually a forgotten or neglected age — to teach itself new manners through old customs .
18 Like other sciences , psychology defines itself by its object .
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