The editor of the series, the "Manual" says, is "usually omitted, but see 17.92-93".
In modern play the diagonal lines of the board are usually omitted.
Note that x + y + z = 1; thus, if two values are known, the third can always be calculated and the z value is usually omitted.
"Being in government is a date with reality, and reality is often not as nice as a dream," was the quip he delivered with a smile, one that is usually omitted from diplomacy school.
One key piece of information that's usually omitted when discussing this subject is that the overall warming of the entire climate system has continued rapidly over the past 15 years, even faster than the 15 years before that.
The 1949 building is usually omitted from architectural guidebooks, although Norval White and Elliot Willensky included it in their A.I.A. Guide to New York City (Crown, 2000) but called it "an insipid box unrelated to any cultural values".
The sextet was usually omitted until the mid-20th century, and an artistic argument can certainly be made for its exclusion, since the opera ends on a note of heightened drama with Giovanni's fiery death.
The opening line of "Twelfth Night" — "If music be the food of love, play on" — has been quoted and needlepointed ad nauseam, but the lines that follow are usually omitted, on account of their sardonic cast: "Give me excess of it; that surfeiting, / The appetite may sicken, and so die".
In the Gradual, the final refrain, or responsory, is usually omitted, making the form R V. Within the divine office, a great responsory (i.e., with a more ornate and longer melody) is sung at Matins, at Vespers on solemn feasts, and in processions; a short responsory is sung following the readings at other services of the office.
The middle step shows the union of the vertices and edges and is usually omitted in visualizations.
