If this is the 21st-century version of Franklin D. Roosevelt's 100 Days, Mr. Obama seems to be pursuing it more as an urgent but imposed necessity than as a self-selected mission.
Now "the end imposes necessity on the means, since 'teeth are sharp in order to cut,' as Aristotle says".
Roy's fifth-floor apartment on Dybenko Street is a meticulous arrangement of books and files, a masterly use of space imposed by necessity.
Jakob has enrolled in a school for servants in order to learn humility, an effort that seems, at first, to be imposed by necessity, since, despite his aristocratic surname, Jakob is almost penniless and needs to make a living somehow: "As an old man I shall have to serve young and confident and badly educated ruffians, or I shall be a beggar, or I shall perish".
aIn Europe, and especially in the (at that time) two Germanies, the International Style was imposed by necessity, due to the great need of reconstructing the cities that had been bombed.
It is to be regretted, that those who may be most convenient to the centre, should enjoy this advantage in a higher degree than others; but the inequality is an evil imposed by necessity; we diminish it as we place the source from which those emanations of wealth are to proceed, as near the centre as possible.
The question, however, is this: are the military strikes by Gulf countries led by Saudi Arabia, with the participation of Egypt and Pakistan, part of a strategy to halt Iranian encroachment in the Arab countries, or is it just a Yemeni episode imposed by necessity?
Because, however, the fusion was based on the two copies of the same gene, the risk of genetic recombination (to remove one copy of a gene or exchange complementary fragments of a gene) imposed a necessity of experimental care to implement protocols that ensured that samples used for kinetic analysis were devoid of unwanted background of recombined proteins.
The weakest requirement imposed on a necessity-like modal operator $\Box$ in systems of classical modal logic is the congruence property: \[\mathord{\vdash A \leftrightarrow B} \slashrel \mathord{\vdash \Box A \leftrightarrow \Box B}\] ("if $A \leftrightarrow B$ is provable, then so is $\Box A \leftrightarrow \Box B$").
He naturally accepts the institutions, manners and customs in which he is educated as necessities imposed upon him by Providence".
"Taking into consideration the difficult situation of the Palestinian people and the necessities imposed by the situation, President Arafat issued a presidential decree by which he declared a state of emergency," Mr. Qurei told The Associated Press.
